Solve for m
m\geq -20
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8m-9\geq -169
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
8m\geq -169+9
Add 9 to both sides.
8m\geq -160
Add -169 and 9 to get -160.
m\geq \frac{-160}{8}
Divide both sides by 8. Since 8 is positive, the inequality direction remains the same.
m\geq -20
Divide -160 by 8 to get -20.
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