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x in (-oo:+oo)
5-((3*x)/4) = 8 // - 8
5-((3*x)/4)-8 = 0
(-3/4)*x-8+5 = 0
-3/4*x-3 = 0 // + 3
-3/4*x = 3 // : -3/4
x = 3/(-3/4)
x = -4
x = -4
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