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x+(3/7)*x+4/5 = 508/385 // - 508/385
x+(3/7)*x+4/5-(508/385) = 0
x+(3/7)*x+4/5-508/385 = 0
10/7*x-40/77 = 0 // + 40/77
10/7*x = 40/77 // : 10/7
x = 40/77/10/7
x = 4/11
x = 4/11
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