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x in (-oo:+oo)
6/5 = (8/2)*x+4 // - (8/2)*x+4
6/5-((8/2)*x)-4 = 0
6/5-4*x-4 = 0
-4*x-14/5 = 0 // + 14/5
-4*x = 14/5 // : -4
x = 14/5/(-4)
x = -7/10
x = -7/10
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