Solve for x
x=-\frac{y}{3}+4
Solve for y
y=12-3x
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-3x=y-12
Swap sides so that all variable terms are on the left hand side.
\frac{-3x}{-3}=\frac{y-12}{-3}
Divide both sides by -3.
x=\frac{y-12}{-3}
Dividing by -3 undoes the multiplication by -3.
x=-\frac{y}{3}+4
Divide y-12 by -3.
y=-3x+12
Add 12 to both sides.
Examples
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Matrix
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Simultaneous equation
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Limits
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