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x in (-oo:+oo)
(3/2)*x+(4/3)*x = -85/9 // + -85/9
(3/2)*x+(4/3)*x-(-85/9) = 0
(3/2)*x+(4/3)*x+85/9 = 0
17/6*x+85/9 = 0 // - 85/9
17/6*x = -85/9 // : 17/6
x = -85/9/17/6
x = -10/3
x = -10/3
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