Solve for x
x=\frac{z-11y}{20}
Solve for y
y=\frac{z-20x}{11}
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20x=z-11y
Subtract 11y from both sides.
\frac{20x}{20}=\frac{z-11y}{20}
Divide both sides by 20.
x=\frac{z-11y}{20}
Dividing by 20 undoes the multiplication by 20.
11y=z-20x
Subtract 20x from both sides.
\frac{11y}{11}=\frac{z-20x}{11}
Divide both sides by 11.
y=\frac{z-20x}{11}
Dividing by 11 undoes the multiplication by 11.
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