Check for a typo:
I will assume that -6z0 is supposed to be -6z
You also have one ( bracket which is not closed, I will assume it closes after the -8z .
z-(2z-[3z-(4z-5z)-6z-7z]-8z)
= z-(2z-[3z-4z+5z-6z-7z]-8z)
= z - (2z -[-9z] -8z)
= z - (2z+9z-8z)
= z - (3z)
= -2z
simplify
z-(2z-[3z-(4z-5z)-6z0-7z]-8z
1 answer