Solve for x
x=-23
Graph
Share
Copied to clipboard
3\left(x-1\right)-4\left(x+2\right)=12
Multiply both sides of the equation by 12, the least common multiple of 4,3.
3x-3-4\left(x+2\right)=12
Use the distributive property to multiply 3 by x-1.
3x-3-4x-8=12
Use the distributive property to multiply -4 by x+2.
-x-3-8=12
Combine 3x and -4x to get -x.
-x-11=12
Subtract 8 from -3 to get -11.
-x=12+11
Add 11 to both sides.
-x=23
Add 12 and 11 to get 23.
x=-23
Multiply both sides by -1.
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}