Solve for b
b=\frac{7x+20}{x^{2}}
x\neq 0
Solve for x (complex solution)
\left\{\begin{matrix}x=\frac{\sqrt{80b+49}+7}{2b}\text{; }x=\frac{-\sqrt{80b+49}+7}{2b}\text{, }&b\neq 0\\x=-\frac{20}{7}\text{, }&b=0\end{matrix}\right.
Solve for x
\left\{\begin{matrix}x=\frac{\sqrt{80b+49}+7}{2b}\text{; }x=\frac{-\sqrt{80b+49}+7}{2b}\text{, }&b\neq 0\text{ and }b\geq -\frac{49}{80}\\x=-\frac{20}{7}\text{, }&b=0\end{matrix}\right.
Graph
Share
Copied to clipboard
x^{2}b=7x+20
The equation is in standard form.
\frac{x^{2}b}{x^{2}}=\frac{7x+20}{x^{2}}
Divide both sides by x^{2}.
b=\frac{7x+20}{x^{2}}
Dividing by x^{2} undoes the multiplication by x^{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}