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