In math, an equation is a mathematical statement saying that two amounts or values are the same. A formula is a series of numbers or letters that represent a mathematical rule. 能被solve的是equation.

In science, a formula is a series of numbers or letters that represent a scientific rule.

formula [Origin: 'small form', from forma; FORM] a method or set of principles that you use to solve a problem or to make sure that something is successful ……的方法或原则，和recipe意思差不多。

• The formula for water is H₂O. 分子式
• Infant formula, baby formula or just formula or baby milk, infant milk, false milk, or first milk, is a manufactured food designed and marketed for feeding to babies and infants under 12 months of age 儿童配方奶
• a formula for a happy marriage 美满婚姻的原则。处方是prescription
  • prescirbe [Origin: praescribere 'to write at the beginning, order']
  • describe [Origin: describere, from scribere 'to write']
  • inscribe [Origin: inscribere, from scribere 'to write'] carefully cut, print, or write words on sth, esply on the surface of a stone or coin
• Formula 1 racing cars 一级方程式赛车。此处formula意为classification

What is the difference between equation and formula?

Equations appear frequently in mathematics because mathematicians love to use equal signs... In your case, "mpg = distance/gallons" is best understood as "a formula in the form of an equation", which means that in this instance the two words are interchangeable.

Equations and Formulas

Sometimes a formula is written without the =. For xxample, the formula for the volume of a box is lwh but in a way the ="is still there, because we can write V = lwh if we want to. 长方体的体积 = length * width * height

10 Maths Equations And Formulas that Changed the World

Logarithms are common in formulas used in science, to measure the complexity of algorithms and fractals, and appear in formulas for counting prime numbers.

六级/考研单词: mathematics, equate, recipe, infant, manufacture, prescribe, seldom, quart, prime

中文有“等式”、“方程”和”公式“，“解方程”，没有“解等式”。

汉典

• 数学中代数两端相等的式子，称为「方程」。
• 方：办法，做法……
• 程：衡量，考核……
• 一秉合十六斛；一斛hú本为十斗，后来改为五斗。

九章算术 : 方程

今有上禾三秉，中禾二秉，下禾一秉，实三十九斗；上禾二秉，中禾三秉，下禾一秉，实三十四斗；上禾一秉，中禾二秉，下禾三秉，实二十六斗。问上、中、下禾实一秉各几何？

方程的起源及发展史 

中国古代数学著作<九章算术》大约成书于公元前200~50年，其中有专门以“方程”命名的一章。这一章中所说的方程实际上就是现在人们所说的一次方程组，方程组由几个方程共同组合而成，它的解是这几个方程的公共解。“方程”一章中以一些实际应用问题为例，并给出了用方程组的解题方法。