Solve for x
x=\frac{15-y^{2}}{2}
Solve for y (complex solution)
y=-\sqrt{15-2x}
y=\sqrt{15-2x}
Solve for y
y=\sqrt{15-2x}
y=-\sqrt{15-2x}\text{, }x\leq \frac{15}{2}
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15-2x=y^{2}
Swap sides so that all variable terms are on the left hand side.
-2x=y^{2}-15
Subtract 15 from both sides.
\frac{-2x}{-2}=\frac{y^{2}-15}{-2}
Divide both sides by -2.
x=\frac{y^{2}-15}{-2}
Dividing by -2 undoes the multiplication by -2.
x=\frac{15-y^{2}}{2}
Divide y^{2}-15 by -2.
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