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x in (-oo:+oo)
(3/4)*x-13 = 3*x-17 // - 3*x-17
(3/4)*x-(3*x)-13+17 = 0
(3/4)*x-3*x-13+17 = 0
4-9/4*x = 0 // - 4
-9/4*x = -4 // : -9/4
x = -4/(-9/4)
x = 16/9
x = 16/9
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