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(2/3)*x-(7/3) = 9 // - 9
(2/3)*x-(7/3)-9 = 0
(2/3)*x-7/3-9 = 0
2/3*x-34/3 = 0 // + 34/3
2/3*x = 34/3 // : 2/3
x = 34/3/2/3
x = 17
x = 17
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