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x in (-oo:+oo)
-11*x-(-12/(-8)) = -15 // + 15
15-11*x-(-12/(-8)) = 0
15-11*x-3/2 = 0
27/2-11*x = 0 // - 27/2
-11*x = -27/2 // : -11
x = -27/2/(-11)
x = 27/22
x = 27/22
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