Solve for x
x=-7
Graph
Share
Copied to clipboard
\left(x-3\right)\times 2=\left(x+3\right)\times 5
Variable x cannot be equal to any of the values -3,3 since division by zero is not defined. Multiply both sides of the equation by \left(x-3\right)\left(x+3\right), the least common multiple of 3+x,x-3.
2x-6=\left(x+3\right)\times 5
Use the distributive property to multiply x-3 by 2.
2x-6=5x+15
Use the distributive property to multiply x+3 by 5.
2x-6-5x=15
Subtract 5x from both sides.
-3x-6=15
Combine 2x and -5x to get -3x.
-3x=15+6
Add 6 to both sides.
-3x=21
Add 15 and 6 to get 21.
x=\frac{21}{-3}
Divide both sides by -3.
x=-7
Divide 21 by -3 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}