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(3*x)/7 = 2/3 // - 2/3
(3*x)/7-(2/3) = 0
(3*x)/7-2/3 = 0
3/7*x-2/3 = 0 // + 2/3
3/7*x = 2/3 // : 3/7
x = 2/3/3/7
x = 14/9
x = 14/9
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