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x in (-oo:+oo)
-11 = (2/3)*x-3 // - (2/3)*x-3
3-((2/3)*x)-11 = 0
(-2/3)*x-11+3 = 0
-2/3*x-8 = 0 // + 8
-2/3*x = 8 // : -2/3
x = 8/(-2/3)
x = -12
x = -12
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