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