x \times (1+25 \% )=9
Solve for x
x = \frac{36}{5} = 7\frac{1}{5} = 7.2
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x\left(1+\frac{1}{4}\right)=9
Reduce the fraction \frac{25}{100} to lowest terms by extracting and canceling out 25.
x\left(\frac{4}{4}+\frac{1}{4}\right)=9
Convert 1 to fraction \frac{4}{4}.
x\times \frac{4+1}{4}=9
Since \frac{4}{4} and \frac{1}{4} have the same denominator, add them by adding their numerators.
x\times \frac{5}{4}=9
Add 4 and 1 to get 5.
x=9\times \frac{4}{5}
Multiply both sides by \frac{4}{5}, the reciprocal of \frac{5}{4}.
x=\frac{9\times 4}{5}
Express 9\times \frac{4}{5} as a single fraction.
x=\frac{36}{5}
Multiply 9 and 4 to get 36.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}