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(6*x-12)/8 = (3*x+12)/10 // - (3*x+12)/10
(6*x-12)/8-((3*x+12)/10) = 0
(6*x-12)/8+(-1*(3*x+12))/10 = 0
(10*(6*x-12))/(8*10)+(-1*8*(3*x+12))/(8*10) = 0
10*(6*x-12)-1*8*(3*x+12) = 0
36*x-216 = 0
(36*x-216)/(8*10) = 0
(36*x-216)/(8*10) = 0 // * 8*10
36*x-216 = 0
36*x-216 = 0 // + 216
36*x = 216 // : 36
x = 216/36
x = 6
x = 6
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