SOLUTION: The sum of two numbers is two hundred fifteen.The difference of the two numbers is seventy-five.What are the numbers?

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Question 58163: The sum of two numbers is two hundred fifteen.The difference of the two numbers is seventy-five.What are the numbers?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
X+Y=215
X-Y=75
X=75+Y
THUS
75+Y+Y=215
2Y=215-75
2Y=140
Y=140/2
Y=70
X+70=215
X=215-70
X=145
PROOF
145-70=75
75=75