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(3*x-2)/7 = -45 // + 45
(3*x-2)/7+45 = 0
(3*x-2)/7+(7*45)/7 = 0
3*x+7*45-2 = 0
3*x+313 = 0
(3*x+313)/7 = 0
(3*x+313)/7 = 0 // * 7
3*x+313 = 0
3*x+313 = 0 // - 313
3*x = -313 // : 3
x = -313/3
x = -313/3
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