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(3/4)*(3*x+9) = 4*(1-(2*x))+13 // - 4*(1-(2*x))+13
(3/4)*(3*x+9)-(4*(1-(2*x)))-13 = 0
(3/4)*(3*x+9)-4*(1-2*x)-13 = 0
3/4*(3*x+9)-4*(1-2*x)-13 = 0
3/4*(3*x+9)-4*(1-2*x)-13 = 0
41/4*x-13+11/4 = 0
41/4*x-41/4 = 0
41/4*x-41/4 = 0
41/4*x-41/4 = 0 // + 41/4
41/4*x = 41/4 // : 41/4
x = 41/4/41/4
x = 1
x = 1
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