Solve for a
a=7
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a=\frac{21}{3}
Divide both sides by 3.
a=7
Divide 21 by 3 to get 7.
Examples
Quadratic equation
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Trigonometry
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Linear equation
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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 ) }
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Limits
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