Equations with parenthesis?

misheeru · 2010-10-12 09:50:54

. . .

bobbym · 2010-10-12 09:52:00

Glad you agree!

misheeru · 2010-10-12 09:57:29

. . . good thing you can't read minds.

bobbym · 2010-10-12 10:02:55

Who says?

misheeru · 2010-10-12 10:07:38

because you would not have made post #102 if you could.

bobbym · 2010-10-12 10:12:41

Perhaps I was being slightly sarcastic. Perhaps I knew and wanted to bait you.

misheeru · 2010-10-12 10:14:30

Indeed. But I took the bait and that makes me just as at fault as you.

bobbym · 2010-10-12 10:15:32

Yes, and I knew you would. One of the advantages of being thousands of years older.

Sarah Rebekah 13 · 2010-10-13 04:20:05

Wow Bobbym I did not know that you can Cook that good yes I know how to make Pasta.

bobbym · 2010-10-13 04:41:16

Hi Sarah;

I can only cook those few things and I can shop. It is the cleaning I hate!

misheeru · 2010-10-13 05:07:15

I hate cleaning, too. But I don't like being too messy either.

Hey, bobbym I has more math!

I understand this a little better now, but I'm not sure about this one:

4( 2x - 3 ) + 8( x - 4 ) = 2( 2x + 6 )

/\

8x - 12 + 8x - 32 = 4x + 12

/\

8x + 8x - 4x = 12 + 32 + 12

/\

12x = 32

/\

12x/1 = 32/12

x = 56/12

x = 4 + 8/12 (simplify)

x = 4 + 2/3

I get mixed up in the steps sometimes... How does it look to you?

bobbym · 2010-10-13 05:22:31

Hi misheeru;

Not too good. Please recheck step 3 to step 4!

misheeru · 2010-10-13 05:31:06

oh man! I typed in my work wrong from my notes!!

I believe its supposed to be:

8x + 8x - 4x = 12 + 32 + 12

/\

12x = 56

12x/1 = 56/12

Last edited by misheeru (2010-10-13 05:31:37)

bobbym · 2010-10-13 05:33:07

The last step is also typed wrong.

misheeru · 2010-10-13 05:39:24

you mean the mixed number?

bobbym · 2010-10-13 05:46:36

Nope, math is like any other language but stiffer, this statement here:

12x = 56 Fine.

12x/1 = 56/12 you divided both sides by 12, fine. What is 12x / 1 ?

misheeru · 2010-10-13 05:56:41

12x?

bobbym · 2010-10-13 06:02:49

misheeru wrote:

12x?

Oh, you got ole bobbym there! Good one! I say what is 12x/1 and you say 12x. Primo, Wunderbar!

That is not what I meant. Look at the step before.

12x = 56

What you do to one side you ust do to the other. The ='s sign is like scale. It means both sides are the equal. If it put 40 pounds on the left of the scale I must put 40 pounds on the right to keep it balanced.

Now when divide the right side by 12 you must divide the left side by 12 also.

(12x) / 12 = 56 / 12 Now go from there...

misheeru · 2010-10-13 06:08:45

From there I used long division. And a teacher used the 1 under the number with the x in an examlple, thats why I did it... sorry.

Anyways:

12 goes into 54, 4 times with a remainder of 8.

Written as a mixed number it is: (4 + 8/12)

4 goes into both 8 and 12.

divide by 4.

Then I got: 4 + 2/3

bobbym · 2010-10-13 06:12:38

Hi misheeru;

Wonderful, except for one thing. Watch those typos.

misheeru · 2010-10-13 06:14:05

Yeah I make them alot.

bobbym · 2010-10-13 06:20:41

Me too. Math has a way of humbling a person. If you think you are great, like those evolutionary biologists then I say to them try mathematics.

But you still have not written the last step. You have not finished the opera and the audience is waiting.

misheeru · 2010-10-13 06:24:01

... Opera my butt...

Okay... what last step?

You mean (4 + 2/3)?

bobbym · 2010-10-13 06:26:51

Math is like cooking, you can not skip things! Not if you want bobbym to go Wunderbar!

The 12's cancel.

misheeru · 2010-10-13 06:28:58

Oh I see.

Now then, what is "Wunderbar"?

Math Is Fun Forum

#101 2010-10-12 09:50:54

Re: Equations with parenthesis?

#102 2010-10-12 09:52:00

Re: Equations with parenthesis?

#103 2010-10-12 09:57:29

Re: Equations with parenthesis?

#104 2010-10-12 10:02:55

Re: Equations with parenthesis?

#105 2010-10-12 10:07:38

Re: Equations with parenthesis?

#106 2010-10-12 10:12:41

Re: Equations with parenthesis?

#107 2010-10-12 10:14:30

Re: Equations with parenthesis?

#108 2010-10-12 10:15:32

Re: Equations with parenthesis?

#109 2010-10-13 04:20:05

Re: Equations with parenthesis?

#110 2010-10-13 04:41:16

Re: Equations with parenthesis?

#111 2010-10-13 05:07:15

Re: Equations with parenthesis?

#112 2010-10-13 05:22:31

Re: Equations with parenthesis?

#113 2010-10-13 05:31:06

Re: Equations with parenthesis?

#114 2010-10-13 05:33:07

Re: Equations with parenthesis?

#115 2010-10-13 05:39:24

Re: Equations with parenthesis?

#116 2010-10-13 05:46:36

Re: Equations with parenthesis?

#117 2010-10-13 05:56:41

Re: Equations with parenthesis?

#118 2010-10-13 06:02:49

Re: Equations with parenthesis?

#119 2010-10-13 06:08:45

Re: Equations with parenthesis?

#120 2010-10-13 06:12:38

Re: Equations with parenthesis?

#121 2010-10-13 06:14:05

Re: Equations with parenthesis?

#122 2010-10-13 06:20:41

Re: Equations with parenthesis?

#123 2010-10-13 06:24:01

Re: Equations with parenthesis?

#124 2010-10-13 06:26:51

Re: Equations with parenthesis?

#125 2010-10-13 06:28:58

Re: Equations with parenthesis?

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