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3/8 = (4/3)*x-3 // - (4/3)*x-3
3/8-((4/3)*x)+3 = 0
(-4/3)*x+3/8+3 = 0
27/8-4/3*x = 0 // - 27/8
-4/3*x = -27/8 // : -4/3
x = -27/8/(-4/3)
x = 81/32
x = 81/32
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