Question 684397
4x+8y=20 
-4x+2y=-30
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Add and solve for "y":
10y = -10
y = -1
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Solve for "x" using 4x + 8y = 20
4x -8 = 20
4x = 28
x = 7
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(x,y): x = 7 ; y = -1
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Cheers,
Stan H.