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(2*x)/3+4 = 5/8 // - 5/8
(2*x)/3-(5/8)+4 = 0
(2*x)/3-5/8+4 = 0
2/3*x+27/8 = 0 // - 27/8
2/3*x = -27/8 // : 2/3
x = -27/8/2/3
x = -81/16
x = -81/16
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