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-1/2x-2 <0 i -x-4<0
-1/2x<2 i -x<4
x>-4 i x>-4
x∈(-4, 6)
b)
-x-4 <-1/2x-2
-x+1/2x < -2+4
-1/2x < 2 /*(-2)
x>-4
x∈(-4, 6)