Solve for a
a=\frac{d-1}{2}
Solve for d
d=2a+1
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2a=d-1
Subtract 1 from both sides.
\frac{2a}{2}=\frac{d-1}{2}
Divide both sides by 2.
a=\frac{d-1}{2}
Dividing by 2 undoes the multiplication by 2.
d=2a+1
Swap sides so that all variable terms are on the left hand side.
Examples
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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