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