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(6/7)*x-(9/5) = 3 // - 3
(6/7)*x-(9/5)-3 = 0
(6/7)*x-9/5-3 = 0
6/7*x-24/5 = 0 // + 24/5
6/7*x = 24/5 // : 6/7
x = 24/5/6/7
x = 28/5
x = 28/5
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