Solve for x
x = \frac{14}{5} = 2\frac{4}{5} = 2.8
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x-9+3x=7-\left(x+2\right)
Use the distributive property to multiply -3 by 3-x.
4x-9=7-\left(x+2\right)
Combine x and 3x to get 4x.
4x-9=7-x-2
To find the opposite of x+2, find the opposite of each term.
4x-9=5-x
Subtract 2 from 7 to get 5.
4x-9+x=5
Add x to both sides.
5x-9=5
Combine 4x and x to get 5x.
5x=5+9
Add 9 to both sides.
5x=14
Add 5 and 9 to get 14.
x=\frac{14}{5}
Divide both sides by 5.
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}