Solve for x
x=2y
Solve for y
y=\frac{x}{2}
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y+4x-2x=5y
Subtract 2x from both sides.
y+2x=5y
Combine 4x and -2x to get 2x.
2x=5y-y
Subtract y from both sides.
2x=4y
Combine 5y and -y to get 4y.
\frac{2x}{2}=\frac{4y}{2}
Divide both sides by 2.
x=\frac{4y}{2}
Dividing by 2 undoes the multiplication by 2.
x=2y
Divide 4y by 2.
y+4x-5y=2x
Subtract 5y from both sides.
-4y+4x=2x
Combine y and -5y to get -4y.
-4y=2x-4x
Subtract 4x from both sides.
-4y=-2x
Combine 2x and -4x to get -2x.
\frac{-4y}{-4}=-\frac{2x}{-4}
Divide both sides by -4.
y=-\frac{2x}{-4}
Dividing by -4 undoes the multiplication by -4.
y=\frac{x}{2}
Divide -2x by -4.
Examples
Quadratic equation
{ 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}