Solve for x
x=-\frac{y}{3}+3
Solve for y
y=9-3x
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3x=9-y
Subtract y from both sides.
\frac{3x}{3}=\frac{9-y}{3}
Divide both sides by 3.
x=\frac{9-y}{3}
Dividing by 3 undoes the multiplication by 3.
x=-\frac{y}{3}+3
Divide 9-y by 3.
y=9-3x
Subtract 3x from both sides.
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
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
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Limits
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