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(2/3)*(21*x+12)-19 = (-3/4)*(12*x-24) // - (-3/4)*(12*x-24)
(2/3)*(21*x+12)-((-3/4)*(12*x-24))-19 = 0
(2/3)*(21*x+12)+(3/4)*(12*x-24)-19 = 0
2/3*(21*x+12)+3/4*(12*x-24)-19 = 0
2/3*(21*x+12)+3/4*(12*x-24)-19 = 0
23*x-19-10 = 0
23*x-29 = 0
23*x-29 = 0
23*x-29 = 0 // + 29
23*x = 29 // : 23
x = 29/23
x = 29/23
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