Solve for a
a=63
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-7\left(-9\right)=a
Multiply both sides by -9, the reciprocal of -\frac{1}{9}.
63=a
Multiply -7 and -9 to get 63.
a=63
Swap sides so that all variable terms are on the left hand side.
Examples
Quadratic equation
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Linear equation
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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