Evaluate
\frac{9}{10}+\frac{1}{b}
Factor
\frac{9b+10}{10b}
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\frac{10}{10}+\frac{1}{b}-\frac{1}{10}
Convert 1 to fraction \frac{10}{10}.
\frac{10-1}{10}+\frac{1}{b}
Since \frac{10}{10} and \frac{1}{10} have the same denominator, subtract them by subtracting their numerators.
\frac{9}{10}+\frac{1}{b}
Subtract 1 from 10 to get 9.
\frac{9b}{10b}+\frac{10}{10b}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 10 and b is 10b. Multiply \frac{9}{10} times \frac{b}{b}. Multiply \frac{1}{b} times \frac{10}{10}.
\frac{9b+10}{10b}
Since \frac{9b}{10b} and \frac{10}{10b} have the same denominator, add them by adding their numerators.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
Arithmetic
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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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