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(4*x-3)/2+(2*x+9)/3 = -42 // + 42
(4*x-3)/2+(2*x+9)/3+42 = 0
(3*(4*x-3))/(2*3)+(2*(2*x+9))/(2*3)+(2*3*42)/(2*3) = 0
3*(4*x-3)+2*(2*x+9)+2*3*42 = 0
16*x+9+252 = 0
16*x+261 = 0
(16*x+261)/(2*3) = 0
(16*x+261)/(2*3) = 0 // * 2*3
16*x+261 = 0
16*x+261 = 0 // - 261
16*x = -261 // : 16
x = -261/16
x = -261/16
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