SOLUTION: one number is four more tyhan twice another. if their sum is decreased by ten, the result is fifteen. what are the two numbers?

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Question 327761: one number is four more tyhan twice another. if their sum is decreased by ten, the result is fifteen. what are the two numbers?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
X=2Y+4
X+Y-10=15
REPLACE X WITH (2Y+4) & SOLVE FOR Y
(2X+4)+Y-10=15
3Y-6=15
3Y=15+6
3Y=21
Y=21/3
Y=7 ANS.
X=2*7+4
X=14+4=18 ANS.
PROOF:
18+7-10=15
25-10=15
15=15