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(2*(x-7.5))/3+6*(x-7.5)-4 = 126 // - 126
(2*(x-7.5))/3+6*(x-7.5)-126-4 = 0
(2*(x-7.5))/3+(3*6*(x-7.5))/3+(-126*3)/3+(-4*3)/3 = 0
2*(x-7.5)+3*6*(x-7.5)-126*3-4*3 = 0
20*x-378-150-12 = 0
20*x-528-12 = 0
20*x-540 = 0
(20*x-540)/3 = 0
(20*x-540)/3 = 0 // * 3
20*x-540 = 0
20*x-540 = 0 // + 540
20*x = 540 // : 20
x = 540/20
x = 27
x = 27
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