Solve for x
x = \frac{13}{2} = 6\frac{1}{2} = 6.5
Graph
Share
Copied to clipboard
15\times 2=\left(6+2\right)\left(x-2\right)-\left(0-2\right)\left(-1-2\right)
Multiply both sides by 2, the reciprocal of \frac{1}{2}.
30=\left(6+2\right)\left(x-2\right)-\left(0-2\right)\left(-1-2\right)
Multiply 15 and 2 to get 30.
30=8\left(x-2\right)-\left(0-2\right)\left(-1-2\right)
Add 6 and 2 to get 8.
30=8x-16-\left(0-2\right)\left(-1-2\right)
Use the distributive property to multiply 8 by x-2.
30=8x-16-\left(-2\left(-1-2\right)\right)
Subtract 2 from 0 to get -2.
30=8x-16-\left(-2\left(-3\right)\right)
Subtract 2 from -1 to get -3.
30=8x-16-6
Multiply -2 and -3 to get 6.
30=8x-22
Subtract 6 from -16 to get -22.
8x-22=30
Swap sides so that all variable terms are on the left hand side.
8x=30+22
Add 22 to both sides.
8x=52
Add 30 and 22 to get 52.
x=\frac{52}{8}
Divide both sides by 8.
x=\frac{13}{2}
Reduce the fraction \frac{52}{8} to lowest terms by extracting and canceling out 4.
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}