What does it mean for a number to be the "solution" to an equation?

Give an example of a variable equation and its solution.
Explain in complete sentences how you know that number is the solution.

Question

What does it mean for a number to be the "solution" to an equation?

    Give an example of a variable equation and its solution.
    Explain in complete sentences how you know that number is the solution.

anonymous · Answer

@Valkarie70

anonymous · Answer

a number is a "solution to an equation" means if you replace the variable by that number, the equation is true.

a simple example would be $x+2=7$ the solution is $5$ because $5+2=7$ is correct
if you replace $x$ by any number other than 5 it would not be correct

anonymous · Answer

3x+20-5=21
x=2

anonymous · Answer

exactly what satellite73 said is correct