Solve for x
x=-\frac{4y}{5}
Solve for y
y=-\frac{5x}{4}
Graph
Share
Copied to clipboard
-2x=1.6y
Swap sides so that all variable terms are on the left hand side.
-2x=\frac{8y}{5}
The equation is in standard form.
\frac{-2x}{-2}=\frac{8y}{-2\times 5}
Divide both sides by -2.
x=\frac{8y}{-2\times 5}
Dividing by -2 undoes the multiplication by -2.
x=-\frac{4y}{5}
Divide \frac{8y}{5} by -2.
1.6y=-2x
The equation is in standard form.
\frac{1.6y}{1.6}=-\frac{2x}{1.6}
Divide both sides of the equation by 1.6, which is the same as multiplying both sides by the reciprocal of the fraction.
y=-\frac{2x}{1.6}
Dividing by 1.6 undoes the multiplication by 1.6.
y=-\frac{5x}{4}
Divide -2x by 1.6 by multiplying -2x by the reciprocal of 1.6.
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}