Solve for a
a=7
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3a=16+5
Add 5 to both sides.
3a=21
Add 16 and 5 to get 21.
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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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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