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Given that R=3x+9y Find y when x = 7 and R=21

Given that R=3x+9y Find y when x = 7 and R=21
40.2k views
2 votes
Given that
R=3x+9y
Find y when x = 7 and R=21

User Jarrell
by
8.5k points

2 Answers

5 votes

Answer:

y = 0

Explanation:

Given

R = 3x + 9y , then

21 = 3(7) + 9y

21 = 21 + 9y ( subtract 21 from both sides )

0 = 9y ( divide both sides by 9 )

y = 0

User Phkoester
by
8.4k points
5 votes

Answer:

y=0

Explanation:

R=3x+9y

(given)

21=3(7)+9y

21=21+9y

9y=21-21

9y=0

y=0

User TutuGeorge
by
8.0k points
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