Solve for x
x=-2
Graph
Share
Copied to clipboard
-\frac{1}{2}\left(-x\right)-\frac{1}{2}\left(-6\right)=-x
Use the distributive property to multiply -\frac{1}{2} by -x-6.
\frac{1}{2}x-\frac{1}{2}\left(-6\right)=-x
Multiply -\frac{1}{2} and -1 to get \frac{1}{2}.
\frac{1}{2}x+\frac{-\left(-6\right)}{2}=-x
Express -\frac{1}{2}\left(-6\right) as a single fraction.
\frac{1}{2}x+\frac{6}{2}=-x
Multiply -1 and -6 to get 6.
\frac{1}{2}x+3=-x
Divide 6 by 2 to get 3.
\frac{1}{2}x+3+x=0
Add x to both sides.
\frac{3}{2}x+3=0
Combine \frac{1}{2}x and x to get \frac{3}{2}x.
\frac{3}{2}x=-3
Subtract 3 from both sides. Anything subtracted from zero gives its negation.
x=-3\times \frac{2}{3}
Multiply both sides by \frac{2}{3}, the reciprocal of \frac{3}{2}.
x=-2
Multiply -3 times \frac{2}{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}