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Two numbers total 12, and their difference is 18. Find the smaller of the two numbers.

 

If you can, please show me how you did it because I can not figure this out

 Feb 25, 2019
 #1
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 x + y = 12

x - y =  18       add these

 

2x = 30       divide both sides by 2

 

x = 15

 

And using    x + y = 12    we have

 

15 + y = 12       subtract  15 from both sides

 

y = -3

 

So  (x,y)  = (15, -3)    ⇒  the smaller number is -3

 

 

cool cool cool

 Feb 25, 2019
edited by CPhill  Feb 25, 2019

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