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x in (-oo:+oo)
(5*x)/6-(x/2) = 43 // - 43
(5*x)/6-(x/2)-43 = 0
1/3*x-43 = 0 // + 43
1/3*x = 43 // : 1/3
x = 43/1/3
x = 129
x = 129
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