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(6/7)*x-4/5 = 592/385-2*x // - 592/385-2*x
(6/7)*x-(-2*x)-4/5-(592/385) = 0
(6/7)*x+2*x-4/5-592/385 = 0
20/7*x-180/77 = 0 // + 180/77
20/7*x = 180/77 // : 20/7
x = 180/77/20/7
x = 9/11
x = 9/11
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