Solve for x
x=4
Graph
Share
Copied to clipboard
\left(x-1\right)\left(3x-2\right)=\left(x-1\right)\left(x+1\right)\times 4-\left(x+1\right)\left(x+2\right)
Variable x cannot be equal to any of the values -1,1 since division by zero is not defined. Multiply both sides of the equation by \left(x-1\right)\left(x+1\right), the least common multiple of x+1,x-1.
3x^{2}-5x+2=\left(x-1\right)\left(x+1\right)\times 4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x-1 by 3x-2 and combine like terms.
3x^{2}-5x+2=\left(x^{2}-1\right)\times 4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x-1 by x+1 and combine like terms.
3x^{2}-5x+2=4x^{2}-4-\left(x+1\right)\left(x+2\right)
Use the distributive property to multiply x^{2}-1 by 4.
3x^{2}-5x+2=4x^{2}-4-\left(x^{2}+3x+2\right)
Use the distributive property to multiply x+1 by x+2 and combine like terms.
3x^{2}-5x+2=4x^{2}-4-x^{2}-3x-2
To find the opposite of x^{2}+3x+2, find the opposite of each term.
3x^{2}-5x+2=3x^{2}-4-3x-2
Combine 4x^{2} and -x^{2} to get 3x^{2}.
3x^{2}-5x+2=3x^{2}-6-3x
Subtract 2 from -4 to get -6.
3x^{2}-5x+2-3x^{2}=-6-3x
Subtract 3x^{2} from both sides.
-5x+2=-6-3x
Combine 3x^{2} and -3x^{2} to get 0.
-5x+2+3x=-6
Add 3x to both sides.
-2x+2=-6
Combine -5x and 3x to get -2x.
-2x=-6-2
Subtract 2 from both sides.
-2x=-8
Subtract 2 from -6 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}