Question 278183: 4.00x + 6.00y = 2340
x + y = 480
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 4.00x + 6.00y = 2340
x + y = 480
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4x + 6y = 2340
x + y = 480
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2x + 3y = 1170
x + y = 480
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Multiply thru the 2nd equation by 2:
2x + 3y = 1170
2x + 2y = 960
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Subtract 2nd from 1st:
y = 210
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substitute into x + y = 480 to solve for "x":
x + 210 = 480
x = 270
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Cheers,
Stan H.
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