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(3/4)*(6*x+12) = 4*x+20 // - 4*x+20
(3/4)*(6*x+12)-(4*x)-20 = 0
(3/4)*(6*x+12)-4*x-20 = 0
3/4*(6*x+12)-4*x-20 = 0
3/4*(6*x+12)-4*x-20 = 0
1/2*x-20+9 = 0
1/2*x-11 = 0
1/2*x-11 = 0
1/2*x-11 = 0 // + 11
1/2*x = 11 // : 1/2
x = 11/1/2
x = 22
x = 22
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