1.4x-120=x-80

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1.4x-120=x-801.4x-120=x-801.4x-120=x-801.4x-120=x-801.4X-X=120-800.4X=40X=100

1.4x-120=x-80
1.4x-120=x-80

1.4x-120=x-80
1.4x-120=x-80
1.4X-X=120-80
0.4X=40
X=100