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