Solve for x
x = \frac{9}{7} = 1\frac{2}{7} \approx 1.285714286
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\left(x+3\right)\times 2+\left(x-3\right)\times 5=0
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 x-3,x+3.
2x+6+\left(x-3\right)\times 5=0
Use the distributive property to multiply x+3 by 2.
2x+6+5x-15=0
Use the distributive property to multiply x-3 by 5.
7x+6-15=0
Combine 2x and 5x to get 7x.
7x-9=0
Subtract 15 from 6 to get -9.
7x=9
Add 9 to both sides. Anything plus zero gives itself.
x=\frac{9}{7}
Divide both sides by 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}