Solve for y
y=\frac{x+\pi -30}{2}
Solve for x
x=2y+30-\pi
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2y+30-\pi =x
Swap sides so that all variable terms are on the left hand side.
2y-\pi =x-30
Subtract 30 from both sides.
2y=x-30+\pi
Add \pi to both sides.
2y=x+\pi -30
The equation is in standard form.
\frac{2y}{2}=\frac{x+\pi -30}{2}
Divide both sides by 2.
y=\frac{x+\pi -30}{2}
Dividing by 2 undoes the multiplication by 2.
y=\frac{x}{2}+\frac{\pi }{2}-15
Divide x-30+\pi by 2.
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