SOLUTION: I need to find the ordered pair 8a+2b=-52 -8a+b=70

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Question 760368: I need to find the ordered pair
8a+2b=-52
-8a+b=70
Found 2 solutions by rfer, MathLover1:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
-8a+b=70
b=8a+70
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8a+2b=-52
8a+2(8a+70)=-52
8a+16a+140=-52
24a=-52-140
24a=-192
a=-192/24
a=-8
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8*-8+2b=-52
-64+2b=-52
2b=-52+64
b=12/2
b=6
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-8*-8+6=70
64+6=70

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

8a%2B2b=-52....eq.1
-8a%2Bb=70....eq.2
__________________________
-8a%2Bb=70....eq.2.solve for b
b=8a%2B70.....substitute in eq. 1
8a%2B2%288a%2B70%29=-52....eq.1...solve for a
8a%2B16a%2B140=-52
24a=-52-140
24a=-192
a=-192%2F24
highlight%28a=-8%29
now find b
b=8a%2B70
b=8%28-8%29%2B70
b=-64%2B70
highlight%28b=6%29