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x/4-4 = 3*x-7 // - 3*x-7
x/4-(3*x)-4+7 = 0
x/4-3*x-4+7 = 0
3-11/4*x = 0 // - 3
-11/4*x = -3 // : -11/4
x = -3/(-11/4)
x = 12/11
x = 12/11
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