\{ 2 x - y - 3 = 0
Solve for x
x=\frac{y+3}{2}
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2x-3=y
Add y to both sides. Anything plus zero gives itself.
2x=y+3
Add 3 to both sides.
\frac{2x}{2}=\frac{y+3}{2}
Divide both sides by 2.
x=\frac{y+3}{2}
Dividing by 2 undoes the multiplication by 2.
Examples
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Matrix
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Integration
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Limits
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