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