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(2*x-2)/7+(5*x-7)/3 = 0
(3*(2*x-2))/(3*7)+(7*(5*x-7))/(3*7) = 0
3*(2*x-2)+7*(5*x-7) = 0
41*x-55 = 0
(41*x-55)/(3*7) = 0
(41*x-55)/(3*7) = 0 // * 3*7
41*x-55 = 0
41*x-55 = 0 // + 55
41*x = 55 // : 41
x = 55/41
x = 55/41
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