Solve for x
x = \frac{25}{8} = 3\frac{1}{8} = 3.125
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7-\frac{9}{\frac{11\left(x-2\right)}{x-2}-\frac{9}{x-2}}=4
To add or subtract expressions, expand them to make their denominators the same. Multiply 11 times \frac{x-2}{x-2}.
7-\frac{9}{\frac{11\left(x-2\right)-9}{x-2}}=4
Since \frac{11\left(x-2\right)}{x-2} and \frac{9}{x-2} have the same denominator, subtract them by subtracting their numerators.
7-\frac{9}{\frac{11x-22-9}{x-2}}=4
Do the multiplications in 11\left(x-2\right)-9.
7-\frac{9}{\frac{11x-31}{x-2}}=4
Combine like terms in 11x-22-9.
7-\frac{9\left(x-2\right)}{11x-31}=4
Variable x cannot be equal to 2 since division by zero is not defined. Divide 9 by \frac{11x-31}{x-2} by multiplying 9 by the reciprocal of \frac{11x-31}{x-2}.
\frac{7\left(11x-31\right)}{11x-31}-\frac{9\left(x-2\right)}{11x-31}=4
To add or subtract expressions, expand them to make their denominators the same. Multiply 7 times \frac{11x-31}{11x-31}.
\frac{7\left(11x-31\right)-9\left(x-2\right)}{11x-31}=4
Since \frac{7\left(11x-31\right)}{11x-31} and \frac{9\left(x-2\right)}{11x-31} have the same denominator, subtract them by subtracting their numerators.
\frac{77x-217-9x+18}{11x-31}=4
Do the multiplications in 7\left(11x-31\right)-9\left(x-2\right).
\frac{68x-199}{11x-31}=4
Combine like terms in 77x-217-9x+18.
68x-199=4\left(11x-31\right)
Variable x cannot be equal to \frac{31}{11} since division by zero is not defined. Multiply both sides of the equation by 11x-31.
68x-199=44x-124
Use the distributive property to multiply 4 by 11x-31.
68x-199-44x=-124
Subtract 44x from both sides.
24x-199=-124
Combine 68x and -44x to get 24x.
24x=-124+199
Add 199 to both sides.
24x=75
Add -124 and 199 to get 75.
x=\frac{75}{24}
Divide both sides by 24.
x=\frac{25}{8}
Reduce the fraction \frac{75}{24} to lowest terms by extracting and canceling out 3.
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}