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3-((3/8)*x) = (1/4)*x+(3/8)*x // - (1/4)*x+(3/8)*x
3-((3/8)*x)-((1/4)*x)-((3/8)*x) = 0
(-3/8)*x+(-1/4)*x+(-3/8)*x+3 = 0
3-x = 0 // - 3
-x = -3 // * -1
x = 3
x = 3
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