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x in (-oo:+oo)
(16*x+20)/2 = 2*x // - 2*x
(16*x+20)/2-(2*x) = 0
(16*x+20)/2-2*x = 0
(16*x+20)/2+(-2*2*x)/2 = 0
16*x-2*2*x+20 = 0
12*x+20 = 0
(12*x+20)/2 = 0
(12*x+20)/2 = 0 // * 2
12*x+20 = 0
12*x+20 = 0 // - 20
12*x = -20 // : 12
x = -20/12
x = -5/3
x = -5/3
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