SOLUTION: The sum of two numbers is 90. The difference is 18. Find the numbers

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Question 248099: The sum of two numbers is 90. The difference is 18. Find the numbers
Answer by tutorcecilia(2152) About Me  (Show Source):
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Let x+y=90 and x-y=18
Use any method to solve for the system of equations. I will use the subraction method:
x+y=90
x-y=18
________
2x=108
.
2x=108
2x/2=108/2
x=54
So,
54+y=90
y=36
Answers
x=54 and y = 36
Check the answers by plugging them back into the origina two equations.