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3/8 = (3/8)*x-(3/2) // - (3/8)*x-(3/2)
3/8-((3/8)*x)+3/2 = 0
(-3/8)*x+3/8+3/2 = 0
15/8-3/8*x = 0 // - 15/8
-3/8*x = -15/8 // : -3/8
x = -15/8/(-3/8)
x = 5
x = 5
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