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marissa [1.9K]
3 years ago
7

*PLEASE HELP ME !!! , READ ATTACHMENTS I WILL GIVE BRAINLIEST !!!

Mathematics
1 answer:
Sladkaya [172]3 years ago
3 0

Answer:

Hello!!

For question twelve, 7z+10-z=8z-2(z-5) is an identity.

For question thirteen, 7y+9=7y-6  has no solution.

Hope this helps!!

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Hello,
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I hope it helped.

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