Solve for x
x=-7
Graph
Share
Copied to clipboard
2\left(x+1\right)\left(x-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Multiply both sides of the equation by 4, the least common multiple of 2,4.
\left(2x+2\right)\left(x-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Use the distributive property to multiply 2 by x+1.
2x^{2}+2x\left(-\frac{1}{2}\right)+2x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Apply the distributive property by multiplying each term of 2x+2 by each term of x-\frac{1}{2}.
2x^{2}-x+2x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Cancel out 2 and 2.
2x^{2}+x+2\left(-\frac{1}{2}\right)=\left(2x-1\right)\left(x+2\right)+15
Combine -x and 2x to get x.
2x^{2}+x-1=\left(2x-1\right)\left(x+2\right)+15
Cancel out 2 and 2.
2x^{2}+x-1=2x^{2}+4x-x-2+15
Apply the distributive property by multiplying each term of 2x-1 by each term of x+2.
2x^{2}+x-1=2x^{2}+3x-2+15
Combine 4x and -x to get 3x.
2x^{2}+x-1=2x^{2}+3x+13
Add -2 and 15 to get 13.
2x^{2}+x-1-2x^{2}=3x+13
Subtract 2x^{2} from both sides.
x-1=3x+13
Combine 2x^{2} and -2x^{2} to get 0.
x-1-3x=13
Subtract 3x from both sides.
-2x-1=13
Combine x and -3x to get -2x.
-2x=13+1
Add 1 to both sides.
-2x=14
Add 13 and 1 to get 14.
x=\frac{14}{-2}
Divide both sides by -2.
x=-7
Divide 14 by -2 to get -7.
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}