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(3*x+14)/4+(x-14)/5 = 9/2 // - 9/2
(3*x+14)/4+(x-14)/5-(9/2) = 0
(3*x+14)/4+(x-14)/5-9/2 = 0
(2*5*(3*x+14))/(2*4*5)+(2*4*(x-14))/(2*4*5)+(-9*4*5)/(2*4*5) = 0
2*5*(3*x+14)+2*4*(x-14)-9*4*5 = 0
38*x-180+28 = 0
38*x-152 = 0
(38*x-152)/(2*4*5) = 0
(38*x-152)/(2*4*5) = 0 // * 2*4*5
38*x-152 = 0
38*x-152 = 0 // + 152
38*x = 152 // : 38
x = 152/38
x = 4
x = 4
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