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aev [14]
3 years ago
10

NEED HELP ASAP PLS! 13 points!

Mathematics
1 answer:
atroni [7]3 years ago
7 0

Answer:

r≥21

Step-by-step explanation:

\frac{r}{3} -9 \geq  -2\\      \frac{r}{3} \geq 7\\r\geq 21

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