SOLUTION: solve the system by elimination 5x+5y= -13 7x-3y= 11 use integers or fractions

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Question 220843: solve the system by elimination
5x+5y= -13
7x-3y= 11
use integers or fractions
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5x+5y= -13 MULTIPLY BY 3
7x-3y= 11 MULTIPLY BY 5 & ADD.
15X+15Y=-39
35X-15Y=55
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50X=16
X=16/50
X=8/25 ANS.
5*8/25+5Y=-13
40/25+5Y=-13
5Y=-13-8/5
5Y=(-13*5-8)/5
5Y=(-65-8)/5
5Y=-73/5
Y=(-73/5)/5
Y=-73/5*1/5
Y=-73/25 ANS.
PROOF:
7(8/25)-3(-73/25)=11
56/25+219/25=11
275/25=11
11=11