Solve for x
x=-3y
Solve for y
y=-\frac{x}{3}
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2x+6y=0
Combine x and x to get 2x.
2x=-6y
Subtract 6y from both sides. Anything subtracted from zero gives its negation.
\frac{2x}{2}=-\frac{6y}{2}
Divide both sides by 2.
x=-\frac{6y}{2}
Dividing by 2 undoes the multiplication by 2.
x=-3y
Divide -6y by 2.
2x+6y=0
Combine x and x to get 2x.
6y=-2x
Subtract 2x from both sides. Anything subtracted from zero gives its negation.
\frac{6y}{6}=-\frac{2x}{6}
Divide both sides by 6.
y=-\frac{2x}{6}
Dividing by 6 undoes the multiplication by 6.
y=-\frac{x}{3}
Divide -2x by 6.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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}