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#26 2006-08-19 21:47:45

Kurre
Member
Registered: 2006-07-18
Posts: 280

Re: Basic Algebra

nik, {hide=answer}write text here{/hide} creates a hide button {=[   and }=]
and do you really need to do a new post for every new exercise you solve??

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#27 2006-08-31 22:58:07

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

Re: Basic Algebra

Algebra Mix - A mix of different exercises = 56-110

56.)    x - 7 = 4
57.)    3 = x + 8
58.)    10 + x = 20
59.)    x - 1 = 1
60.)    - 2x = - 22
61.)    - 4x - 9 = - 45
62.)    2 + 3x = - 31
63.)    - 2x + 9 = 13
64.)    3x - 1 = 23
65.)    7x - 6 = - 48
66.)    2x + 4 - x = 15
67.)    x + 9 + 5x = 15
68.)    3x - 6 + 2x = 29
69.)    6x + 7 + 7x = - 123
70.)    x + 4 + 6x = 4
71.)    - 3x + 7 = 7x - 113
72.)    1 - 6x = x - 20
73.)    5x + 9 = - 6x + 20
74.)    8 + 2x = - 4x + 56
75.)    - 6x + 7 = 6x - 5
76.)    4(8 + 3x) = - 112
77.)    - 7(6x - 6) = 168
78.)    7(8 - 6x) = - 70
79.)    6( - 7x + 2) = - 240
80.)    4(5x + 7) = - 72
81.)    x - 3y = - 16
          - x + 4y = 22
82.)    3x - 5y = 29
      3x + 5y = - 41
83.)    4x + 4y = 8
      5x - 4y = 10
84.)    4x + 5y = 45
       - 4x + y = - 15
85.)    4x + 5y = 32
      2x - 5y = - 14
86.)    - 4x - 3y = - 22
       - 4x + 3y = 38
87.)    - x + 3y = - 31
       - 4x + 3y = - 43
88.)    5x + 5y = - 60
      3x + 5y = - 50
89.)    2x - 4y = 16
      2x - 2y = 2
90.)    - 3x - 3y = - 27
       - 3x + 2y = - 12
91.)    - 3x - 3y = - 21
       - 3x - 4y = - 21
92.)    2x + 3y = - 16
      2x - 3y = 44
93.)    2x + 2y = 20
       - 2x - y = - 12
94.)    3x + y = 18
       - 3x - 4y = - 18
95.)    - 3x + 5y = - 45
       - 3x - 5y = - 15
96.)    - 5x + y = - 9
       - 15x + 2y = - 33
97.)    3x + 4y = 2
       - 5x - 8y = - 14

98.)    - 4x - 2y = 28
       - 12x + 3y = 102
99.)    5x + 2y = 1
      - x + 8y = 67
100.)    x - 5y = - 40
      2x - 20y = - 160
101.)    3x - y = - 11
      x - 2y = 13
102.)    4x + 4y = - 36
       - 4x + y = - 9
103.)    4x - 4y = - 4
      5x - y = - 21
104.)    - 5x + y = - 30
      4x - 3y = 24
105.)    - 4x + 2y = 22
      5x - 2y = - 26
106.)    x = 4y + 9
      5x + 2y = 45
107.)    x = - 3y + 18
      x = - y + 0
108.)    3y - 3x = 39
      y = 3x + 27
109.)    x = - 4y - 39
      x + 3y = - 29
110.)    y + x = 8
      y = - 3x + 26

52, 53, 54 and 55 are also unanswered on page 1.

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#28 2006-12-10 03:11:57

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

how do i do post reply 2 in steps.

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#29 2006-12-10 03:13:28

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

how do i do post reply 2(6) in steps.

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#30 2006-12-10 03:27:35

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

56)x=4+7
    x=11

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#31 2006-12-10 03:29:28

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

57)8-3=x
    5=x

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#32 2006-12-10 03:32:11

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

58)x=20-10
    x=10
59)x=1+1
    x=2

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#33 2006-12-10 03:35:00

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

60)x=-22+2
    x=-20

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#34 2006-12-10 03:35:13

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

Re: Basic Algebra

Correct.

vipaman wrote:

how do i do post reply 2(6) in steps.

What does this mean?

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#35 2006-12-10 03:36:44

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

61)x-9=-45+4
    x-9=-41
    x=-41+9
    x=-31

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#36 2006-12-10 03:37:59

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

what is the method for that.

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#37 2006-12-10 03:42:10

Devantè
Real Member
Registered: 2006-07-14
Posts: 6,400

Re: Basic Algebra

Number 2 or number 6?

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#38 2006-12-10 03:46:50

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

62)3x=-31-2
     3x=-33
     x=-33/3
     x=-11

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#39 2006-12-10 03:48:49

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

post no.2
Q no.6

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#40 2006-12-10 03:51:45

vipaman
Member
Registered: 2006-09-30
Posts: 22

Re: Basic Algebra

63)-2x=13-9
    x=4/2
    x=2
64)3x=23+1
     3x=24
     x=24/3
     x=8

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#41 2007-10-21 15:18:28

jonjayshua
Member
Registered: 2007-10-21
Posts: 0

Re: Basic Algebra

how would you solve: 5Y+15(Y+15)=35

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#42 2007-10-21 16:50:26

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,552

Re: Basic Algebra

5Y+15(Y+15)=35
5Y+15(Y)+15(15)=35
5Y+15Y+225=35
Subtract 225 from both sides: 5Y+15Y+225-225=35-225
5Y+15Y=-190
20Y = -190
Divide both sides by 20: Y = -190/20
Y = -9.5

Test by substitution:
5Y+15(Y+15)=35
5(-9.5)+15(-9.5+15)=35
-47.5 + 82.5 = 35
35 = 35


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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