Answer:
The person above me is correct. The answer is -23x
Explanation:
you would subtract the 8y from 8y
Then add -21x to -2x to get -23x
-23x
-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.
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