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(5*x)/2-((2*x)/6) = 4-7/6 // - 4-7/6
(5*x)/2-((2*x)/6)-(-7/6)-4 = 0
(5*x)/2+(-1/3)*x+7/6-4 = 0
13/6*x-17/6 = 0 // + 17/6
13/6*x = 17/6 // : 13/6
x = 17/6/13/6
x = 17/13
x = 17/13
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