13. Add the following:3xy-4y-
5zx,-9y+8zx and -6xy
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Answer:
13zx-9y-6xy
Step-by-step explanation:
= 5zx+(-9y)+8zx+(-6xy)
= 5zx-9y+8zx-6xy
= 5zx+8zx-9y-6xy
= 13zx-9y-6xy
hope my ans is helpful
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