From Longman Dictionary of Contemporary Englishequatione‧qua‧tion /ɪˈkweɪʒən/ ●●○ AWL noun 1 [countable]HM a statement in mathematics that shows that two amounts or totals are equal → algebra In the equation 2x + 1 = 7, what is x?2 [countable usually singular]EFFECT/INFLUENCE the set of different facts, ideas, or people that all affect a situation and must be considered together The tourist industry forms a crucial part of the region’s economic equation. The question of cost has now entered the equation.3 [singular]SAME when you consider that two things are similar or connected the equation of violence with powerCOLLOCATIONS – Meaning 1: a statement in mathematics that shows that two amounts or totals are equalverbssolve an equationFor homework, solve the equations on page 56.work out an equationI spent over an hour trying to work out the equation.adjectivesa mathematical equationa set of mathematical equationsa quadratic equation (=one that involves an unknown quantity that is multiplied by itself)phrasesa side of an equation (=the letters and numbers on one side of an equals sign)Find the square root of both sides of the equation.the left-hand/right-hand side of an equationAdd up what you've got on the right-hand side of the equation.
COLLOCATIONS – Meaning 2: the set of different facts, ideas, or people that all affect a situation and must be considered togetheradjectivesa complex equationNew factors are beginning to affect what is an already complex equation.verbssomething enters/comes into the equation (=something begins to have an effect)Consumer confidence also enters the equation.bring something into the equation (=introduce a new idea for people to consider )It all becomes more complicated once you bring money into the equation.phrasesa part of the equationThe tourist industry is a crucial part of the country’s overall economic equation.a side of an equationWe need to discuss the financial side of the equation.

Examples from the Corpus

equation• The restrictions generated by rational expectations models are very often non-linear and are also imposed across equations rather than in a single equation.• Some of the math is quite sophisticated, using differential equations, linear algebra, and covariance matrices.• A daring proposal was made to reconcile the continuity of the Schrödinger equation with the discontinuity of empirical experience.• My equations were visual and phonetic.• Mathematicians scribble equations on blackboards and program supercomputers to make the billions of calculations needed to break a tough code.• From the production and factor supply equations, we obtain the basic growth equation.• If you're trying to get healthy by losing weight, exercise should be part of the equation.• The equations preceded the actual observations.• What A Present View forces us to do is to reconsider a traditional equation between humanism and liberalism.part of ... equation• The first part of the equation was relatively successful.• Without this human part of the equation then the multitude would not have satisfied.• But we can see them for what they are, which is part of the equation, not the equation itself.• Bees are a reminder that individuals are just part of the evolutionary equation.• High taxes and increased demand represent just part of the equation establishing the retail price of gas, however.• Francis Lee: ready to help Manchester City - but current chairman Swales is not part of the equation.• Scientific evidence is only part of the equation.From Longman Business Dictionaryequatione‧qua‧tion /ɪˈkweɪʒən/ noun [countable] a statement in mathematics, showing that two quantities are equal → accounting equation