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(7-(2*x))/5 = 3*x // - 3*x
(7-(2*x))/5-(3*x) = 0
(7-2*x)/5-3*x = 0
(7-2*x)/5+(-3*5*x)/5 = 0
7-2*x-3*5*x = 0
7-17*x = 0
(7-17*x)/5 = 0
(7-17*x)/5 = 0 // * 5
7-17*x = 0
7-17*x = 0 // - 7
-17*x = -7 // : -17
x = -7/(-17)
x = 7/17
x = 7/17
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