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(1/7)*x-3/5 = 4*x+309/385 // - 4*x+309/385
(1/7)*x-(4*x)-3/5-(309/385) = 0
(1/7)*x-4*x-3/5-309/385 = 0
-27/7*x-108/77 = 0 // + 108/77
-27/7*x = 108/77 // : -27/7
x = 108/77/(-27/7)
x = -4/11
x = -4/11
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