Question 309875: .05x+.25y=11 and .15x+.05y=-12
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! .05x+.25y=11
.15x+.05y=-12
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Multiply thru both equations by 100.
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5x + 25y = 1100
15x + 5y = -1200
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Multiply thru the 1st equation by 3:
15x + 75y = 3300
15x + 5y = -1200
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Substract the 2nd from the 1st:
70y = 4500
y = 64.29
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Substitute into 5x + 25y = 1100
5x + 25*64.29 = 1100
5x = -507.14
x = -101.42
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Check in 15x+5y = -1200
15(-101.42) + 5(64.29) = -1199.85
Answers check.
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Cheers,
Stan H.
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