Solve for x
x=6
Graph
Share
Copied to clipboard
2x+15+3+15=2\left(x+x+3\right)+15
Combine x and x to get 2x.
2x+18+15=2\left(x+x+3\right)+15
Add 15 and 3 to get 18.
2x+33=2\left(x+x+3\right)+15
Add 18 and 15 to get 33.
2x+33=2\left(2x+3\right)+15
Combine x and x to get 2x.
2x+33=4x+6+15
Use the distributive property to multiply 2 by 2x+3.
2x+33=4x+21
Add 6 and 15 to get 21.
2x+33-4x=21
Subtract 4x from both sides.
-2x+33=21
Combine 2x and -4x to get -2x.
-2x=21-33
Subtract 33 from both sides.
-2x=-12
Subtract 33 from 21 to get -12.
x=\frac{-12}{-2}
Divide both sides by -2.
x=6
Divide -12 by -2 to get 6.
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}