simplify 8 - {x - (5 + x)}
8 - {x - (5 + x)} = 8 - {x - 5 - x} = 8 + 5 = 13
−8(x−(5+x))=(−8)(x+−5+−x)=(−8)(x)+(−8)(−5)+(−8)(−x)=−8x+40+8x=40
