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27 = (3/4)*x // - (3/4)*x
27-((3/4)*x) = 0
(-3/4)*x+27 = 0
27-3/4*x = 0 // - 27
-3/4*x = -27 // : -3/4
x = -27/(-3/4)
x = 36
x = 36
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