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(3*x+8)/4 = (3*x+30)/18 // - (3*x+30)/18
(3*x+8)/4-((3*x+30)/18) = 0
(3*x+8)/4+(-1*(3*x+30))/18 = 0
(18*(3*x+8))/(4*18)+(-1*4*(3*x+30))/(4*18) = 0
18*(3*x+8)-1*4*(3*x+30) = 0
42*x+24 = 0
(42*x+24)/(4*18) = 0
(42*x+24)/(4*18) = 0 // * 4*18
42*x+24 = 0
42*x+24 = 0 // - 24
42*x = -24 // : 42
x = -24/42
x = -4/7
x = -4/7
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