Solve for y
y=\frac{x+7}{2}
Solve for x
x=2y-7
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2y-7=x
Swap sides so that all variable terms are on the left hand side.
2y=x+7
Add 7 to both sides.
\frac{2y}{2}=\frac{x+7}{2}
Divide both sides by 2.
y=\frac{x+7}{2}
Dividing by 2 undoes the multiplication by 2.
Examples
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Matrix
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Simultaneous equation
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Integration
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Limits
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