Solve for x
x=-4y-16
Solve for y
y=-\frac{x}{4}-4
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-\frac{1}{4}x-4=y
Swap sides so that all variable terms are on the left hand side.
-\frac{1}{4}x=y+4
Add 4 to both sides.
\frac{-\frac{1}{4}x}{-\frac{1}{4}}=\frac{y+4}{-\frac{1}{4}}
Multiply both sides by -4.
x=\frac{y+4}{-\frac{1}{4}}
Dividing by -\frac{1}{4} undoes the multiplication by -\frac{1}{4}.
x=-4y-16
Divide y+4 by -\frac{1}{4} by multiplying y+4 by the reciprocal of -\frac{1}{4}.
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
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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