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(2/3)*(3*x+1) = 5 // - 5
(2/3)*(3*x+1)-5 = 0
2/3*(3*x+1)-5 = 0
2/3*(3*x+1)-5 = 0
2*x-13/3 = 0
2*x-13/3 = 0
2*x-13/3 = 0 // + 13/3
2*x = 13/3 // : 2
x = 13/3/2
x = 13/6
x = 13/6
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