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10*(x-6) = (2/5)*(x+4)-((1/5)*x) // - (2/5)*(x+4)-((1/5)*x)
10*(x-6)-((2/5)*(x+4))+(1/5)*x = 0
10*(x-6)+(-2/5)*(x+4)+(1/5)*x = 0
10*(x-6)-2/5*(x+4)+x/5 = 0
(5*10*(x-6))/5+(-2/5*5*(x+4))/5+x/5 = 0
5*10*(x-6)-2/5*5*(x+4)+x = 0
48*x+x-308 = 0
49*x-308 = 0
(49*x-308)/5 = 0
(49*x-308)/5 = 0 // * 5
49*x-308 = 0
49*x-308 = 0 // + 308
49*x = 308 // : 49
x = 308/49
x = 44/7
x = 44/7
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