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(1/3)*x-(5/2) = 6 // - 6
(1/3)*x-(5/2)-6 = 0
(1/3)*x-5/2-6 = 0
1/3*x-17/2 = 0 // + 17/2
1/3*x = 17/2 // : 1/3
x = 17/2/1/3
x = 51/2
x = 51/2
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