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40-((3*x)/5) = 6*x+6/8 // - 6*x+6/8
40-((3*x)/5)-(6*x)-(6/8) = 0
(-3/5)*x-6*x-3/4+40 = 0
157/4-33/5*x = 0 // - 157/4
-33/5*x = -157/4 // : -33/5
x = -157/4/(-33/5)
x = 785/132
x = 785/132
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