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3*x+x+13/2-(13/3) = 19/2 // - 19/2
3*x+x+13/2-(13/3)-(19/2) = 0
3*x+x+13/2-13/3-19/2 = 0
4*x-22/3 = 0 // + 22/3
4*x = 22/3 // : 4
x = 22/3/4
x = 11/6
x = 11/6
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