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(1/4)*x+3/8 = 12 // - 12
(1/4)*x+3/8-12 = 0
1/4*x-93/8 = 0 // + 93/8
1/4*x = 93/8 // : 1/4
x = 93/8/1/4
x = 93/2
x = 93/2
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