Solve for x
x=\frac{y}{3}+\frac{13}{9}
Solve for y
y=3x-\frac{13}{3}
Graph
Share
Copied to clipboard
-9x=-13-3y
Subtract 3y from both sides.
-9x=-3y-13
The equation is in standard form.
\frac{-9x}{-9}=\frac{-3y-13}{-9}
Divide both sides by -9.
x=\frac{-3y-13}{-9}
Dividing by -9 undoes the multiplication by -9.
x=\frac{y}{3}+\frac{13}{9}
Divide -13-3y by -9.
3y=-13+9x
Add 9x to both sides.
3y=9x-13
The equation is in standard form.
\frac{3y}{3}=\frac{9x-13}{3}
Divide both sides by 3.
y=\frac{9x-13}{3}
Dividing by 3 undoes the multiplication by 3.
y=3x-\frac{13}{3}
Divide -13+9x by 3.
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}