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(2*x)/3 = -((x-4)/5)-6 // + -((x-4)/5)-6
(x-4)/5+(2*x)/3+6 = 0
(3*(x-4))/(3*5)+(2*5*x)/(3*5)+(3*5*6)/(3*5) = 0
3*(x-4)+2*5*x+3*5*6 = 0
13*x-12+90 = 0
13*x+78 = 0
(13*x+78)/(3*5) = 0
(13*x+78)/(3*5) = 0 // * 3*5
13*x+78 = 0
13*x+78 = 0 // - 78
13*x = -78 // : 13
x = -78/13
x = -6
x = -6
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