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x in (-oo:+oo)
(-2/3)*x-2 = (4/5)*x-4 // - (4/5)*x-4
(-2/3)*x-((4/5)*x)-2+4 = 0
(-2/3)*x+(-4/5)*x-2+4 = 0
2-22/15*x = 0 // - 2
-22/15*x = -2 // : -22/15
x = -2/(-22/15)
x = 15/11
x = 15/11
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