SOLUTION: ELIMINATION METHOD 3X-5Y=66 3Y=8-5X SUBSITUTION METHOD 15X-10Y=-5 5Y+3+10X

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Question 332135: ELIMINATION METHOD
3X-5Y=66
3Y=8-5X

SUBSITUTION METHOD
15X-10Y=-5
5Y+3+10X
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
ELIMINATION METHOD
3X-5Y=66 MULTIPLY BY 3
3Y=8-5X
5X+3Y=8 MULTIPLY BY 5 & ADD.
9X-15Y=198
25X+15Y=40
------------------
34X=238
X=238/34
X=7 ANS.
3*7-5Y=66
21-5Y=66
-5Y=66-21
-5Y=45
Y=45/-5
Y=-9 ANS.
PROOF:
5*7+3*-9=8
35-27=8
8=8
SUBSITUTION METHOD
15X-10Y=-5
5Y+3+10X [no = sign in this equation. can't solve.