Answer:
-23x
Step-by-step explanation:
-8y and +8y cancel, making +0.
-2x and +(-21x) simplify down to -2x -21x, and then even further down to -23x.
-23x and +0 make -23x.
The person above me is correct. The answer is -23x
you would subtract the 8y from 8y
Then add -21x to -2x to get -23x
