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(3/8)*x+1/4 = 1 // - 1
(3/8)*x+1/4-1 = 0
3/8*x-3/4 = 0 // + 3/4
3/8*x = 3/4 // : 3/8
x = 3/4/3/8
x = 2
x = 2
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