Solve for r
r\geq 3
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3r\geq 10-1
Subtract 1 from both sides.
3r\geq 9
Subtract 1 from 10 to get 9.
r\geq \frac{9}{3}
Divide both sides by 3. Since 3 is positive, the inequality direction remains the same.
r\geq 3
Divide 9 by 3 to get 3.
Examples
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Matrix
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Limits
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