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(1/8)*x+23/4 = 4 // - 4
(1/8)*x+23/4-4 = 0
1/8*x+7/4 = 0 // - 7/4
1/8*x = -7/4 // : 1/8
x = -7/4/1/8
x = -14
x = -14
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