Question 466753
solve using the Solve using the substitution method
-x + 6y = 54 
3x + y = 9

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Multiply thru the 1st equation by 3:
-3x + 18y = 3*54
3x  +   y =   9
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Add and solve for "y":
19y = 171
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y = 9
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Solve for "x":
3x + y = 9
3x = 0
x = 0
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Cheers,
Stan H.