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(1/3)*(x-6) = (-2/5)*x+14/15 // - (-2/5)*x+14/15
(1/3)*(x-6)-((-2/5)*x)-(14/15) = 0
(1/3)*(x-6)+(2/5)*x-14/15 = 0
1/3*(x-6)+(2*x)/5-14/15 = 0
(1/3*5*15*(x-6))/(5*15)+(2*15*x)/(5*15)+(-14*5)/(5*15) = 0
1/3*5*15*(x-6)+2*15*x-14*5 = 0
55*x-150-70 = 0
55*x-220 = 0
(55*x-220)/(5*15) = 0
(55*x-220)/(5*15) = 0 // * 5*15
55*x-220 = 0
55*x-220 = 0 // + 220
55*x = 220 // : 55
x = 220/55
x = 4
x = 4
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