C1noun1K

Equation

UK /["/ɪˈkweɪʒn/"]/US /["/ɪˈkweɪʒn/"]/

Definition

a statement showing that two amounts or values are equal, for example 2x + y = 54

In simple words: A math sentence that shows two things are equal.

Examples

the numbers on the right-hand side of the equation
the equation for a straight line
The ideal gas equation is derived from this model.
This can be shown by a simple equation.
the range of values of ξ which would satisfy this equation
The equation of wealth with happiness can be dangerous.
When children **enter the equation**, further tensions may arise within a marriage.
Money also **comes into the equation**.
The availability of public transport is also **part of the equation**.

Usage notes

Used mostly in academic settings or when discussing math and science. Avoid in casual conversations unless contextually relevant.

Grammar pattern

noun

Memory hint

Think of a balance scale: both sides of the equation must weigh the same.

Collocations

basic
simple
complex
solve
work out
derive
equation for
a side of the equation
be a part of
come into
enter

Synonyms

formula
expression
statement

Antonyms

inequality
expression

Common mistakes

Confused with 'equate', which is a verb.
Using the plural incorrectly as 'equations' without appropriate context.
Confusing 'equation' with 'expression', which is not necessarily equal.