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