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#1 2023-10-09 17:33:36
- sologuitar
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- Registered: 2022-09-19
- Posts: 467
Find Two Numbers
Two numbers add to 72. One number is twice the other. Find the numbers.
Let me see.
Let x and y be the two numbers.
x + y = 72.
One number is TWICE the other can be expressed like this:
x = 2y or y = 2x.
I will use x = 2y.
I think the correct system of equations is the following:
x + y = 72
x = 2y
Correct?
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#2 2023-10-09 18:03:46
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 46,317
Re: Find Two Numbers
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#3 2023-10-09 23:31:26
- Bob
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- Registered: 2010-06-20
- Posts: 10,196
Re: Find Two Numbers
Yes, those equations will work.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#4 2023-10-09 23:58:13
- sologuitar
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- Registered: 2022-09-19
- Posts: 467
Re: Find Two Numbers
Cool. I worked out my own system of equations in terms of x and y and got the same answers.
Check
24 + 48 = 72
24 is half of 48
Cool.
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#5 2023-10-10 00:02:09
- sologuitar
- Member
- Registered: 2022-09-19
- Posts: 467
Re: Find Two Numbers
Yes, those equations will work.
Bob
Good morning, Bob.
I worked out my own system of equations and got
the same answers. Of course, this is ab easy word problem.
My problem concerns more involved longer applications.
Sometimes I manage to set up the correct equation(s) but
most of the time it's an up hill climb.
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