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5 problems similar to:
\frac { 25 - \frac { 4 } { 5 x } } { \frac { 4 } { 25 x } - 5 }
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\frac{\frac{25\times 5x}{5x}-\frac{4}{5x}}{\frac{4}{25x}-5}
To add or subtract expressions, expand them to make their denominators the same. Multiply 25 times \frac{5x}{5x}.
\frac{\frac{25\times 5x-4}{5x}}{\frac{4}{25x}-5}
Since \frac{25\times 5x}{5x} and \frac{4}{5x} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{125x-4}{5x}}{\frac{4}{25x}-5}
Do the multiplications in 25\times 5x-4.
\frac{\frac{125x-4}{5x}}{\frac{4}{25x}-\frac{5\times 25x}{25x}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 5 times \frac{25x}{25x}.
\frac{\frac{125x-4}{5x}}{\frac{4-5\times 25x}{25x}}
Since \frac{4}{25x} and \frac{5\times 25x}{25x} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{125x-4}{5x}}{\frac{4-125x}{25x}}
Do the multiplications in 4-5\times 25x.
\frac{\left(125x-4\right)\times 25x}{5x\left(4-125x\right)}
Divide \frac{125x-4}{5x} by \frac{4-125x}{25x} by multiplying \frac{125x-4}{5x} by the reciprocal of \frac{4-125x}{25x}.
\frac{-25x\left(-125x+4\right)}{5x\left(-125x+4\right)}
Extract the negative sign in 125x-4.
-5
Cancel out 5x\left(-125x+4\right) in both numerator and denominator.
Examples
Quadratic equation
{ 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}