SOLUTION: If the sum of two no. is 57 and difference is 20. What are the possible pairs. Plez help me

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Question 1089721: If the sum of two no. is 57 and difference is 20. What are the possible pairs.
Plez help me
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
x + y = 57.
x - y = 20.
-----------------Add the two equations. You will get

2x = 57 + 20 = 77.   Hence,  x = 77%2F2  = 38.5.

Then from the first equation,  y = 57 - 37.5 = 18.5.


Two possible pairs are (38.5,18.5)  and  (18.5,38.5).

Solved.