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Solve for r. 21 = 42 - 3r A. r = -8 B. r = -7 C. r = 7 D. r = 8
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16 votes
Solve for r.

21 = 42 - 3r

A. r = -8

B. r = -7

C. r = 7

D. r = 8

User Lazer
by
4.2k points

2 Answers

2 votes

Answer:

-7

Explanation:

User Jorge Ramos
by
4.3k points
7 votes

Answer:7

Explanation:

21=42-3r

21-42=3r

-21=3r

r=7

User Jayakumar Thangavel
by
3.8k points
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