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(1/2)*x+4 = 8*x+23/8 // - 8*x+23/8
(1/2)*x-(8*x)-(23/8)+4 = 0
(1/2)*x-8*x-23/8+4 = 0
9/8-15/2*x = 0 // - 9/8
-15/2*x = -9/8 // : -15/2
x = -9/8/(-15/2)
x = 3/20
x = 3/20
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