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(1/4)*x-(31/2) = 61/4 // - 61/4
(1/4)*x-(31/2)-(61/4) = 0
(1/4)*x-31/2-61/4 = 0
1/4*x-123/4 = 0 // + 123/4
1/4*x = 123/4 // : 1/4
x = 123/4/1/4
x = 123
x = 123
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