Look up equation in Wiktionary, the free dictionary.

An equation in mathematics is a formula stating that two expressions have the same value.

Equation may also refer to:

• Chemical equation, a symbolic representation of a chemical reaction
• Equation of time, the difference between solar time, as shown by a sundial, and mean time, as shown by a clock that runs at constant speed
  • Equation clock, a clock that contains a mechanism that embodies the equation of time, so the clock shows solar time
• Equation of state, a relationship between physical conditions and the state of a material
• Equation (band), an English folk band formed in 1996
• Equation Group, a computer espionage group
• "The Equation", a 2008 episode of Fringe
• "[Equation]" (ΔM_i⁻¹ = −αΣ_n=1^ND_i[n] [Σ_j∈C[i]F_ji[n − 1] + Fext_i[n⁻¹]]), the first B-side of "Windowlicker" by Aphex Twin, also known as "[Formula]"

See also

• List of equations