SOLUTION: Solve for a and b : -5b - 2a = 46 7a

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Question 548342: Solve for a and b :
-5b - 2a = 46
7a - 5b = 19
Found 2 solutions by mananth, stanbon:
Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website!
-5 b -2 a = 46 .............1
-5 b + 7 a = 19 .............2
multiply equation (1) by -1
we get
5b+2a=-46
add to (2)
9a=-27
/9
a=-3
plug the value of a in (1)
-5b-2(-3)=46
-5b+6=46
-5b=40
/-5
b=-8

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
Solve for a and b :
-5b - 2a = 46
7a - 5b = 19
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Rearrange:
-2a - 5b = 46
7a - 5b = 19
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Subtract and solve for "a":
9a = -27
a = -3
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Solve for "b":
-2a - 5b = 46
-2*-3 -5b = 46
6 - 5b = 46
-5b = 40
b = -8
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Solution: (-3,-8)
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Cheers,
Stan H.
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SOLUTION: Solve for a and b : -5b - 2a = 46 7a - 5b = 19