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x in (-oo:+oo)
(2/3)*x+(1/4)*x = 22 // - 22
(2/3)*x+(1/4)*x-22 = 0
11/12*x-22 = 0 // + 22
11/12*x = 22 // : 11/12
x = 22/11/12
x = 24
x = 24
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