Solve for R
R = \frac{21}{5} = 4\frac{1}{5} = 4.2
Assign R
R≔\frac{21}{5}
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R=\frac{16}{5}+\frac{5}{5}
Convert 1 to fraction \frac{5}{5}.
R=\frac{16+5}{5}
Since \frac{16}{5} and \frac{5}{5} have the same denominator, add them by adding their numerators.
R=\frac{21}{5}
Add 16 and 5 to get 21.
Examples
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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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