Solve for x
x = \frac{12}{7} = 1\frac{5}{7} \approx 1.714285714
Graph
Share
Copied to clipboard
9x-4=3x-8x+20
Combine 5x and 4x to get 9x.
9x-4=-5x+20
Combine 3x and -8x to get -5x.
9x-4+5x=20
Add 5x to both sides.
14x-4=20
Combine 9x and 5x to get 14x.
14x=20+4
Add 4 to both sides.
14x=24
Add 20 and 4 to get 24.
x=\frac{24}{14}
Divide both sides by 14.
x=\frac{12}{7}
Reduce the fraction \frac{24}{14} to lowest terms by extracting and canceling out 2.
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}