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x in (-oo:+oo)
(4-8)*((9*x)/4) = 3*x+2 // - 3*x+2
(4-8)*((9*x)/4)-(3*x)-2 = 0
(4-8)*((9*x)/4)-3*x-2 = 0
-12*x-2 = 0 // + 2
-12*x = 2 // : -12
x = 2/(-12)
x = -1/6
x = -1/6
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