Solve for x
x=8
Graph
Share
Copied to clipboard
\left(x+5\right)x-\left(x-3\right)\times 8=x^{2}
Variable x cannot be equal to any of the values -5,3 since division by zero is not defined. Multiply both sides of the equation by \left(x-3\right)\left(x+5\right), the least common multiple of x-3,x+5,x^{2}+2x-15.
x^{2}+5x-\left(x-3\right)\times 8=x^{2}
Use the distributive property to multiply x+5 by x.
x^{2}+5x-\left(8x-24\right)=x^{2}
Use the distributive property to multiply x-3 by 8.
x^{2}+5x-8x+24=x^{2}
To find the opposite of 8x-24, find the opposite of each term.
x^{2}-3x+24=x^{2}
Combine 5x and -8x to get -3x.
x^{2}-3x+24-x^{2}=0
Subtract x^{2} from both sides.
-3x+24=0
Combine x^{2} and -x^{2} to get 0.
-3x=-24
Subtract 24 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-24}{-3}
Divide both sides by -3.
x=8
Divide -24 by -3 to get 8.
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}