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56 = (7/4)*x // - (7/4)*x
56-((7/4)*x) = 0
(-7/4)*x+56 = 0
56-7/4*x = 0 // - 56
-7/4*x = -56 // : -7/4
x = -56/(-7/4)
x = 32
x = 32
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