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(3*x+16)/5+(x+15)/6 = 8 // - 8
(3*x+16)/5+(x+15)/6-8 = 0
(6*(3*x+16))/(5*6)+(5*(x+15))/(5*6)+(-8*5*6)/(5*6) = 0
6*(3*x+16)+5*(x+15)-8*5*6 = 0
23*x-240+171 = 0
23*x-69 = 0
(23*x-69)/(5*6) = 0
(23*x-69)/(5*6) = 0 // * 5*6
23*x-69 = 0
23*x-69 = 0 // + 69
23*x = 69 // : 23
x = 69/23
x = 3
x = 3
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