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x in (-oo:+oo)
5*x-(3*(2*x-1)) = 4/7 // - 4/7
5*x-(3*(2*x-1))-(4/7) = 0
5*x-3*(2*x-1)-4/7 = 0
(-3*7*(2*x-1))/7+(5*7*x)/7-4/7 = 0
5*7*x-3*7*(2*x-1)-4 = 0
21-7*x-4 = 0
17-7*x = 0
(17-7*x)/7 = 0
(17-7*x)/7 = 0 // * 7
17-7*x = 0
17-7*x = 0 // - 17
-7*x = -17 // : -7
x = -17/(-7)
x = 17/7
x = 17/7
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