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