Solve for t
t=\frac{x-24}{7}
Solve for x
x=7t+24
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24+7t=x
Swap sides so that all variable terms are on the left hand side.
7t=x-24
Subtract 24 from both sides.
\frac{7t}{7}=\frac{x-24}{7}
Divide both sides by 7.
t=\frac{x-24}{7}
Dividing by 7 undoes the multiplication by 7.
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