Solve for x
x=\frac{y+13}{3}
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3x=13+y
Add y to both sides.
3x=y+13
The equation is in standard form.
\frac{3x}{3}=\frac{y+13}{3}
Divide both sides by 3.
x=\frac{y+13}{3}
Dividing by 3 undoes the multiplication by 3.
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