Solve for x
x=\frac{23-y}{9}
Solve for y
y=23-9x
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9x=23-y
Subtract y from both sides.
\frac{9x}{9}=\frac{23-y}{9}
Divide both sides by 9.
x=\frac{23-y}{9}
Dividing by 9 undoes the multiplication by 9.
y=23-9x
Subtract 9x from both sides.
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