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(1/3)*x+2 = 13/3 // - 13/3
(1/3)*x-(13/3)+2 = 0
(1/3)*x-13/3+2 = 0
1/3*x-7/3 = 0 // + 7/3
1/3*x = 7/3 // : 1/3
x = 7/3/1/3
x = 7
x = 7
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