# equation

Equation is part of the Academic Word List. It is important for students in college and university.

### Pronunciation

• enPR: ĭkwā'zhən, IPA (key): /ɪˈkweɪʒən/
• enPR: ĭkwā'shən, IPA (key): /ɪˈkweɪʃən/
•  Audio (US) (file)

## Noun

1. (countable) An equation is a mathematical statement in which both sides are of equal value.
Find $x$ , in the equation $x+2y=3y$ .
Using equation (2.1) from above, we can now solve for $x$ .
2. (countable); (usually singular) An equation is how everything works together to create a situation.
Money plays a big part in the political equation.
3. (uncountable) The equation of $x$ with $y$ , is the act of thinking about them as the same or as belonging together.
The equation of women with maids and cooks must stop.

Examples:

$E=mc^{2}\!\,$ $E=h\nu \!\,$ $a={\dfrac {L}{2}}-b$ {\begin{aligned}&\nabla \cdot \mathbf {D} =\rho _{f}\\&\nabla \cdot \mathbf {B} =0\\&\nabla \times \mathbf {E} =-{\frac {\partial \mathbf {B} }{\partial t}}\\&\nabla \times \mathbf {H} =\mathbf {J} _{f}+{\frac {\partial \mathbf {D} }{\partial t}}\end{aligned}} $\oint _{C}E\cdot dl=-{\frac {d}{dt}}\int _{S}B_{n}dA$ $14{\sqrt {x}}+\vert 15\vert =\vert 71\vert$ ${\frac {\hbar ^{2}}{2m}}\,\nabla ^{2}\Psi +V\Psi =i\hbar \,{\frac {\partial \Psi }{\partial t}}$ 