Solve for x
x=\frac{13-y}{7}
Solve for y
y=13-7x
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-7x+13=y
Combine x and -8x to get -7x.
-7x=y-13
Subtract 13 from both sides.
\frac{-7x}{-7}=\frac{y-13}{-7}
Divide both sides by -7.
x=\frac{y-13}{-7}
Dividing by -7 undoes the multiplication by -7.
x=\frac{13-y}{7}
Divide y-13 by -7.
-7x+13=y
Combine x and -8x to get -7x.
y=-7x+13
Swap sides so that all variable terms are on the left hand side.
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