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(4/7)*x-(2/7) = 4/7 // - 4/7
(4/7)*x-(2/7)-(4/7) = 0
(4/7)*x-2/7-4/7 = 0
4/7*x-6/7 = 0 // + 6/7
4/7*x = 6/7 // : 4/7
x = 6/7/4/7
x = 3/2
x = 3/2
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