\{ x - 1 / 3 y + 1 = 0
Solve for x
x=\frac{y-3}{3}
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x+1=\frac{1}{3}y
Add \frac{1}{3}y to both sides. Anything plus zero gives itself.
x=\frac{1}{3}y-1
Subtract 1 from both sides.
Examples
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Matrix
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Limits
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