Solve for x
x=-\frac{y}{3}-1
Solve for y
y=-3x-3
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-3x=y+3
Swap sides so that all variable terms are on the left hand side.
\frac{-3x}{-3}=\frac{y+3}{-3}
Divide both sides by -3.
x=\frac{y+3}{-3}
Dividing by -3 undoes the multiplication by -3.
x=-\frac{y}{3}-1
Divide y+3 by -3.
y=-3x-3
Subtract 3 from both sides.
Examples
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Linear equation
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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