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x in (-oo:+oo)
(7*x)/4-3 = 3/4-(2*x) // - 3/4-(2*x)
(7*x)/4+2*x-(3/4)-3 = 0
(7*x)/4+2*x-3/4-3 = 0
15/4*x-15/4 = 0 // + 15/4
15/4*x = 15/4 // : 15/4
x = 15/4/15/4
x = 1
x = 1
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