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(4/5)*x+3 = 4/38 // - 4/38
(4/5)*x-(4/38)+3 = 0
(4/5)*x-2/19+3 = 0
4/5*x+55/19 = 0 // - 55/19
4/5*x = -55/19 // : 4/5
x = -55/19/4/5
x = -275/76
x = -275/76
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