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