4X+8Y=16,4X+2Y=40

Solve by elmination
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1 Answer

line1: 4x+8y=16 or 2x+4y=8 or x+2y=4

line 2: 4x+2y=40 or 2x+y=20

line2 -line1...(2x-2x) +(4y-y) =(8-20)

3y=-12

y=-4

line1...x=4-2y=4+8=12
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