Solve for x
x=\frac{y-1}{3}
Solve for y
y=3x+1
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1+x\times 3=y
Swap sides so that all variable terms are on the left hand side.
x\times 3=y-1
Subtract 1 from both sides.
3x=y-1
The equation is in standard form.
\frac{3x}{3}=\frac{y-1}{3}
Divide both sides by 3.
x=\frac{y-1}{3}
Dividing by 3 undoes the multiplication by 3.
Examples
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Simultaneous equation
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Limits
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