Solve for a
a=\frac{x-12}{6}
Solve for x
x=6\left(a+2\right)
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6a=x-12
Subtract 12 from both sides.
\frac{6a}{6}=\frac{x-12}{6}
Divide both sides by 6.
a=\frac{x-12}{6}
Dividing by 6 undoes the multiplication by 6.
a=\frac{x}{6}-2
Divide x-12 by 6.
x=6a+12
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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