Solve for x
x\leq -\frac{31}{3}
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-3x\geq 10+21
Add 21 to both sides.
-3x\geq 31
Add 10 and 21 to get 31.
x\leq -\frac{31}{3}
Divide both sides by -3. Since -3 is negative, the inequality direction is changed.
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