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