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(1/2)*x+1/4 = 12 // - 12
(1/2)*x+1/4-12 = 0
1/2*x-47/4 = 0 // + 47/4
1/2*x = 47/4 // : 1/2
x = 47/4/1/2
x = 47/2
x = 47/2
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