Q: What is the purpose of an equation?

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To replace a number in an equation

The purpose is to determine the available energy. Some of the energy in any system is useless - can't be converted into useful work.

You don't use unknown variables to solve an equation. The purpose of solving an equation is to find the value of the variable so that it's no longer unknown.

All things are sorted or categorized in this world. We need to know the proper equation to find the solution to which set theory is best for our purpose.

The purpose of every mathematical equation to assist us in predicting (calculating) the outcome of counting.For example,3+2=5, if we put together 3 potatoes and another 2 potatoes and count them all together, we will find 5 potatoes!

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The purpose of a chemical equation balancer is to balance the equation, so nothing blows up and you are kept nice and safe from any harm that might of happen.

A mathematical equation.

To replace a number in an equation

to help find the answer to real world situations

The purpose is to determine the available energy. Some of the energy in any system is useless - can't be converted into useful work.

A chemical equation lets humans explain a chemical reaction. When the same reaction occurs repeatedly, the equation serves to remind us of what happened in the reaction.

You don't use unknown variables to solve an equation. The purpose of solving an equation is to find the value of the variable so that it's no longer unknown.

A chemical equation balancer program is used to ensure that the law of conservation of mass is obeyed in a chemical equation. It assigns coefficients to the reactants and products to balance the number of atoms of each element on both sides of the equation. This helps in accurately representing the chemical reaction.

The purpose of the break even equation, simply stated, is the determine the number of units a company must sell in order to brea-even (get out of debt). After you have determined the number of units, you then know where you will make a profit.

The Navier-Strokes equation is a term in physics used to describe the motion of a fluid substance. The equation applies Newton's second law to fluid motion.

A chemical equation lets humans explain a chemical reaction. When the same reaction occurs repeatedly, the equation serves to remind us of what happened in the reaction.

Mechanical differential analyzers.Electronic differential analyzers.Linear equation solvers.Harmonic analyzers.Polynomial equation solvers.Differential equation solvers.True analogs (electrolytic tanks, membrane analogies, photo-elastic models)Electrical mesh finite element analyzers.Special purpose slide rules.Planimeters.Integraphs.etc.