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x in (-oo:+oo)
x/3-(3/4) = (5*x)/12+1 // - (5*x)/12+1
x/3-((5*x)/12)-(3/4)-1 = 0
x/3+(-5/12)*x-3/4-1 = 0
-1/12*x-7/4 = 0 // + 7/4
-1/12*x = 7/4 // : -1/12
x = 7/4/(-1/12)
x = -21
x = -21
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