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nikitadnepr [17]
3 years ago
8

Plzzz answerrrrrrrrrrr

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
5 0
9. -16
10. 3
11. 4
12. -5
14. -12
15. 20
frutty [35]3 years ago
3 0

Answer:

9. -16

10. 3

11. 4

Step-by-step explanation:

9. 21 = 5 - r

Subtract 5 from both sides;

16 = -r

Divide both sides by -1

-16 = r OR r = -16

10. 8 - 5b = -7

Subtract 8 from both sides;

-5b = -15

Divide both sides by -5

b = 3

11. -10 = 6 - 4m

Subtract 6 from both sides;

-16 = -4m

Divide both sides by -4

4 = m OR m = 4

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