Solve for x
x=9
Graph
Share
Copied to clipboard
30\left(5x+7\right)-15\left(3x+5\right)=24\left(4x+9\right)-40\left(x-9\right)
Multiply both sides of the equation by 120, the least common multiple of 4,8,5,3.
150x+210-15\left(3x+5\right)=24\left(4x+9\right)-40\left(x-9\right)
Use the distributive property to multiply 30 by 5x+7.
150x+210-45x-75=24\left(4x+9\right)-40\left(x-9\right)
Use the distributive property to multiply -15 by 3x+5.
105x+210-75=24\left(4x+9\right)-40\left(x-9\right)
Combine 150x and -45x to get 105x.
105x+135=24\left(4x+9\right)-40\left(x-9\right)
Subtract 75 from 210 to get 135.
105x+135=96x+216-40\left(x-9\right)
Use the distributive property to multiply 24 by 4x+9.
105x+135=96x+216-40x+360
Use the distributive property to multiply -40 by x-9.
105x+135=56x+216+360
Combine 96x and -40x to get 56x.
105x+135=56x+576
Add 216 and 360 to get 576.
105x+135-56x=576
Subtract 56x from both sides.
49x+135=576
Combine 105x and -56x to get 49x.
49x=576-135
Subtract 135 from both sides.
49x=441
Subtract 135 from 576 to get 441.
x=\frac{441}{49}
Divide both sides by 49.
x=9
Divide 441 by 49 to get 9.
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}