Solve for x
x=4
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5=3x-9-\left(x-6\right)
Use the distributive property to multiply 3 by x-3.
5=3x-9-x-\left(-6\right)
To find the opposite of x-6, find the opposite of each term.
5=3x-9-x+6
The opposite of -6 is 6.
5=2x-9+6
Combine 3x and -x to get 2x.
5=2x-3
Add -9 and 6 to get -3.
2x-3=5
Swap sides so that all variable terms are on the left hand side.
2x=5+3
Add 3 to both sides.
2x=8
Add 5 and 3 to get 8.
x=\frac{8}{2}
Divide both sides by 2.
x=4
Divide 8 by 2 to get 4.
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}