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x in (-oo:+oo)
(-3*x)/4+5/4 = -5/2 // + -5/2
(-3*x)/4+5/4-(-5/2) = 0
(-3*x)/4+5/4+5/2 = 0
15/4-3/4*x = 0 // - 15/4
-3/4*x = -15/4 // : -3/4
x = -15/4/(-3/4)
x = 5
x = 5
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