An equation refers to an equation containing unknowns. It is an equation that represents the equal relationship between two mathematical expressions (such as two numbers, functions, quantities and operations), and the value of the unknown quantity that makes the equation hold is called "solution" or "root". The process of finding the solution of the equation is called "solving the equation".

X=2 contains the unknown X. x=2 is an equation, so x=2 is an equation.

Extended data:

The relationship between equation and equality: the equation must be an equation, but the equation is not necessarily an equation.

Example: a+b= 13 conforms to the equation, and there are unknowns. This is an equation and an equation.

1+ 1=2 , 100× 100= 10000。 These two formulas are consistent with the equation, but there are no unknowns, so they are not equations.

In the definition, the equation must be an equation, but there can be other equations, such as 1+ 1 = 2,100×10000 =10000, all of which are equations. Obviously, the range of the equation is very large.

The same solution principle of the equation;

Adding or subtracting the same number or the same equation on both sides of the equation is the same solution equation as the original equation.

2. The equation obtained by multiplying or dividing the same number whose two sides are not zero is the same as the original equation.

Integral equation: An algebraic expression equation with unknowns on both sides is called an integral equation.

Fractional equation: The equation with unknown number in denominator is called fractional equation.

Baidu Encyclopedia-Equation