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x in (-oo:+oo)
(2/3)*x-5 = x/4 // - x/4
(2/3)*x-(x/4)-5 = 0
5/12*x-5 = 0 // + 5
5/12*x = 5 // : 5/12
x = 5/5/12
x = 12
x = 12
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