Solve for C
C=\frac{5-2y}{9}
Solve for y
y=\frac{5-9C}{2}
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9C=5-2y
Subtract 2y from both sides.
\frac{9C}{9}=\frac{5-2y}{9}
Divide both sides by 9.
C=\frac{5-2y}{9}
Dividing by 9 undoes the multiplication by 9.
2y=5-9C
Subtract 9C from both sides.
\frac{2y}{2}=\frac{5-9C}{2}
Divide both sides by 2.
y=\frac{5-9C}{2}
Dividing by 2 undoes the multiplication by 2.
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