SOLUTION: 3(x+y)=7(y-x),5(3x-y)=x+3

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Question 881527: 3(x+y)=7(y-x),5(3x-y)=x+3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
3%28x%2By%29=7%28y-x%29
3x%2B3y=7y-7x
10x-4y=0
1.5x-2y=0
.
.
.
5%283x-y%29=x%2B3
15x-5y=x%2B3
2.14x-5y=3
Multiply eq. 1 by 5 and eq. 2 by 2 and subtract.
25x-10y-%2828x-10y%29=0-6
-3x=-6
x=2
Then,
5%282%29-2y=0
2y=10
y=5