Solve for x
x = \frac{33}{4} = 8\frac{1}{4} = 8.25
Graph
Share
Copied to clipboard
-2x+20=\frac{7}{2}
Swap sides so that all variable terms are on the left hand side.
-2x=\frac{7}{2}-20
Subtract 20 from both sides.
-2x=\frac{7}{2}-\frac{40}{2}
Convert 20 to fraction \frac{40}{2}.
-2x=\frac{7-40}{2}
Since \frac{7}{2} and \frac{40}{2} have the same denominator, subtract them by subtracting their numerators.
-2x=-\frac{33}{2}
Subtract 40 from 7 to get -33.
x=\frac{-\frac{33}{2}}{-2}
Divide both sides by -2.
x=\frac{-33}{2\left(-2\right)}
Express \frac{-\frac{33}{2}}{-2} as a single fraction.
x=\frac{-33}{-4}
Multiply 2 and -2 to get -4.
x=\frac{33}{4}
Fraction \frac{-33}{-4} can be simplified to \frac{33}{4} by removing the negative sign from both the numerator and the denominator.
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}