Solve for r
r\leq -9
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9r+15-10r\geq 24
Subtract 10r from both sides.
-r+15\geq 24
Combine 9r and -10r to get -r.
-r\geq 24-15
Subtract 15 from both sides.
-r\geq 9
Subtract 15 from 24 to get 9.
r\leq -9
Divide both sides by -1. Since -1 is negative, the inequality direction is changed.
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