Solve for t
t=-\frac{1}{3}\approx -0.333333333
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-9t-12t=7
Subtract 12t from both sides.
-21t=7
Combine -9t and -12t to get -21t.
t=\frac{7}{-21}
Divide both sides by -21.
t=-\frac{1}{3}
Reduce the fraction \frac{7}{-21} to lowest terms by extracting and canceling out 7.
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