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(2/3)*x+4*x-1/2 = 137/6 // - 137/6
(2/3)*x+4*x-1/2-(137/6) = 0
(2/3)*x+4*x-1/2-137/6 = 0
14/3*x-70/3 = 0 // + 70/3
14/3*x = 70/3 // : 14/3
x = 70/3/14/3
x = 5
x = 5
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