Solve for t
t\leq -\frac{3}{7}
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-7t\geq 15-12
Subtract 12 from both sides.
-7t\geq 3
Subtract 12 from 15 to get 3.
t\leq -\frac{3}{7}
Divide both sides by -7. Since -7 is negative, the inequality direction is changed.
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