Solve for x
x=9-7y
Solve for y
y=\frac{9-x}{7}
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1x=9-7y
Subtract 7y from both sides.
x=-7y+9
Reorder the terms.
7y=9-x
Subtract 1x from both sides.
\frac{7y}{7}=\frac{9-x}{7}
Divide both sides by 7.
y=\frac{9-x}{7}
Dividing by 7 undoes the multiplication by 7.
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