Solve for x
x=-\frac{8y}{9-y}
y\neq 9
Solve for y
y=-\frac{9x}{8-x}
x\neq 8
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9x+8y-xy=0
Subtract xy from both sides.
9x-xy=-8y
Subtract 8y from both sides. Anything subtracted from zero gives its negation.
\left(9-y\right)x=-8y
Combine all terms containing x.
\frac{\left(9-y\right)x}{9-y}=-\frac{8y}{9-y}
Divide both sides by 9-y.
x=-\frac{8y}{9-y}
Dividing by 9-y undoes the multiplication by 9-y.
9x+8y-xy=0
Subtract xy from both sides.
8y-xy=-9x
Subtract 9x from both sides. Anything subtracted from zero gives its negation.
\left(8-x\right)y=-9x
Combine all terms containing y.
\frac{\left(8-x\right)y}{8-x}=-\frac{9x}{8-x}
Divide both sides by 8-x.
y=-\frac{9x}{8-x}
Dividing by 8-x undoes the multiplication by 8-x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}