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7x - 8x +4 -2 = 5 - 4x - 2
-x +4x = 5 - 2 -4 +2
3x = 1
x = 1/3
7x-(8x-4)-2=5-(4x+2)
7x-8x+4-2=5-4x-2
7x-8x+4x=5-2-4+2
3x=1.
x=1/3.
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