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x/2-((2*x)/3)-((3*x)/4) = -11 // + 11
x/2-((2*x)/3)-((3*x)/4)+11 = 0
x/2+(-2/3)*x+(-3/4)*x+11 = 0
11-11/12*x = 0 // - 11
-11/12*x = -11 // : -11/12
x = -11/(-11/12)
x = 12
x = 12
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