Solve for x
x = \frac{20}{9} = 2\frac{2}{9} \approx 2.222222222
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\frac{\left(5-x\right)\times 4}{5}=x
Express \frac{5-x}{5}\times 4 as a single fraction.
\frac{20-4x}{5}=x
Use the distributive property to multiply 5-x by 4.
4-\frac{4}{5}x=x
Divide each term of 20-4x by 5 to get 4-\frac{4}{5}x.
4-\frac{4}{5}x-x=0
Subtract x from both sides.
4-\frac{9}{5}x=0
Combine -\frac{4}{5}x and -x to get -\frac{9}{5}x.
-\frac{9}{5}x=-4
Subtract 4 from both sides. Anything subtracted from zero gives its negation.
x=-4\left(-\frac{5}{9}\right)
Multiply both sides by -\frac{5}{9}, the reciprocal of -\frac{9}{5}.
x=\frac{-4\left(-5\right)}{9}
Express -4\left(-\frac{5}{9}\right) as a single fraction.
x=\frac{20}{9}
Multiply -4 and -5 to get 20.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}