Solve for a
a=-\frac{u}{4}+\frac{1}{2}
Solve for u
u=2-4a
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-4a+2=u
Swap sides so that all variable terms are on the left hand side.
-4a=u-2
Subtract 2 from both sides.
\frac{-4a}{-4}=\frac{u-2}{-4}
Divide both sides by -4.
a=\frac{u-2}{-4}
Dividing by -4 undoes the multiplication by -4.
a=-\frac{u}{4}+\frac{1}{2}
Divide u-2 by -4.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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