Solve for x
x=-\frac{n^{2}}{4}+35
Solve for n (complex solution)
n=-2\sqrt{35-x}
n=2\sqrt{35-x}
Solve for n
n=2\sqrt{35-x}
n=-2\sqrt{35-x}\text{, }x\leq 35
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n^{2}+4x=140
Swap sides so that all variable terms are on the left hand side.
4x=140-n^{2}
Subtract n^{2} from both sides.
\frac{4x}{4}=\frac{140-n^{2}}{4}
Divide both sides by 4.
x=\frac{140-n^{2}}{4}
Dividing by 4 undoes the multiplication by 4.
x=-\frac{n^{2}}{4}+35
Divide 140-n^{2} by 4.
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