Solve for y
y=-x+\frac{4}{x}
x\neq 0
Solve for x
x=\frac{\sqrt{y^{2}+16}-y}{2}
x=\frac{-\sqrt{y^{2}+16}-y}{2}
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xy-4=-x^{2}
Subtract x^{2} from both sides. Anything subtracted from zero gives its negation.
xy=-x^{2}+4
Add 4 to both sides.
xy=4-x^{2}
The equation is in standard form.
\frac{xy}{x}=\frac{4-x^{2}}{x}
Divide both sides by x.
y=\frac{4-x^{2}}{x}
Dividing by x undoes the multiplication by x.
y=-x+\frac{4}{x}
Divide -x^{2}+4 by x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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