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(x+7)/14+(3/7)*x = 1 // - 1
(x+7)/14+(3/7)*x-1 = 0
(x+7)/14+(3*x)/7-1 = 0
(7*(x+7))/(7*14)+(3*14*x)/(7*14)+(-1*7*14)/(7*14) = 0
7*(x+7)+3*14*x-1*7*14 = 0
49*x-98+49 = 0
49*x-49 = 0
(49*x-49)/(7*14) = 0
(49*x-49)/(7*14) = 0 // * 7*14
49*x-49 = 0
49*x-49 = 0 // + 49
49*x = 49 // : 49
x = 49/49
x = 1
x = 1
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