Solve for t
t=\frac{y+1}{3}
Solve for y
y=3t-1
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3t-1=y
Swap sides so that all variable terms are on the left hand side.
3t=y+1
Add 1 to both sides.
\frac{3t}{3}=\frac{y+1}{3}
Divide both sides by 3.
t=\frac{y+1}{3}
Dividing by 3 undoes the multiplication by 3.
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