Solve for y
y = \frac{11}{9} = 1\frac{2}{9} \approx 1.222222222
Graph
Share
Copied to clipboard
2\left(9-y\right)+20y=40
Multiply both sides of the equation by 5.
18-2y+20y=40
Use the distributive property to multiply 2 by 9-y.
18+18y=40
Combine -2y and 20y to get 18y.
18y=40-18
Subtract 18 from both sides.
18y=22
Subtract 18 from 40 to get 22.
y=\frac{22}{18}
Divide both sides by 18.
y=\frac{11}{9}
Reduce the fraction \frac{22}{18} to lowest terms by extracting and canceling out 2.
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}