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x in (-oo:+oo)
-((2*x)/3)-10 = -11 // + 11
11-((2*x)/3)-10 = 0
(-2/3)*x-10+11 = 0
1-2/3*x = 0 // - 1
-2/3*x = -1 // : -2/3
x = -1/(-2/3)
x = 3/2
x = 3/2
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