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(3*x+2)/7 = -19 // + 19
(3*x+2)/7+19 = 0
(3*x+2)/7+(7*19)/7 = 0
3*x+7*19+2 = 0
3*x+135 = 0
(3*x+135)/7 = 0
(3*x+135)/7 = 0 // * 7
3*x+135 = 0
3*x+135 = 0 // - 135
3*x = -135 // : 3
x = -135/3
x = -45
x = -45
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