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3*x-4 = (1/4)*(12-(16*x)) // - (1/4)*(12-(16*x))
3*x-((1/4)*(12-(16*x)))-4 = 0
(-1/4)*(12-16*x)+3*x-4 = 0
3*x-1/4*(12-16*x)-4 = 0
3*x-1/4*(12-16*x)-4 = 0
7*x-4-3 = 0
7*x-7 = 0
7*x-7 = 0
7*x-7 = 0 // + 7
7*x = 7 // : 7
x = 7/7
x = 1
x = 1
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