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x in (-oo:+oo)
x/2-4 = (3*x)/4-6 // - (3*x)/4-6
x/2-((3*x)/4)-4+6 = 0
x/2+(-3/4)*x-4+6 = 0
2-1/4*x = 0 // - 2
-1/4*x = -2 // : -1/4
x = -2/(-1/4)
x = 8
x = 8
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