Solve for x
x=\frac{y+11}{2}
Solve for y
y=2x-11
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-3x+y+x=-11
Add x to both sides.
-2x+y=-11
Combine -3x and x to get -2x.
-2x=-11-y
Subtract y from both sides.
-2x=-y-11
The equation is in standard form.
\frac{-2x}{-2}=\frac{-y-11}{-2}
Divide both sides by -2.
x=\frac{-y-11}{-2}
Dividing by -2 undoes the multiplication by -2.
x=\frac{y+11}{2}
Divide -11-y by -2.
y=-11-x+3x
Add 3x to both sides.
y=-11+2x
Combine -x and 3x to get 2x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
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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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