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Usimov [2.4K]
3 years ago
13

Help pls I’ll give brainlis

Mathematics
1 answer:
Tcecarenko [31]3 years ago
3 0

Answer:

b=-1

Step-by-step explanation:

you need to make sure that you can add 7 and have the answer be 4cm because, and if you subtract 4 from 7 you get 3 so the should add onto a -3 and the only way to turn the 3 into -3 is to multiply the 3 by -1

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