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x in (-oo:+oo)
x/2+(3*x)/4-(1/1) = -9/1 // + -9/1
x/2+(3*x)/4-(1/1)-(-9/1) = 0
x/2+(3*x)/4-1+9 = 0
5/4*x+8 = 0 // - 8
5/4*x = -8 // : 5/4
x = -8/5/4
x = -32/5
x = -32/5
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