Solve for x
x=3\left(y-1\right)
Solve for y
y=\frac{x+3}{3}
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3x=-9+9y
Add 9y to both sides.
3x=9y-9
The equation is in standard form.
\frac{3x}{3}=\frac{9y-9}{3}
Divide both sides by 3.
x=\frac{9y-9}{3}
Dividing by 3 undoes the multiplication by 3.
x=3y-3
Divide -9+9y by 3.
-9y=-9-3x
Subtract 3x from both sides.
-9y=-3x-9
The equation is in standard form.
\frac{-9y}{-9}=\frac{-3x-9}{-9}
Divide both sides by -9.
y=\frac{-3x-9}{-9}
Dividing by -9 undoes the multiplication by -9.
y=\frac{x}{3}+1
Divide -9-3x by -9.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}