The number that replaces a variable is the solution to the equation. great question, but it's only the answer.??
When you put the number in place of the variable (like maybe the 'x' or the 'y') wherever the variable occurs in the equation, and the statement you get out of all the numbers you have is not true, then you know the number is not a solution.
It's called the "solution" of the equation.
Answer 1 == In an open sentence (an equation or inequality with a variable in it), when a number replacing the variable makes the sentence true, then it is a solution.
Substitute the value found back into the equation, evaluate the expressions and see if the resulting equation is true.
The solution. If more than one, the solution set.
An algebraic equation or inequality can have a solution, an algebraic expression cannot. If substituting a number in place of a variable results in the equation or inequality being a true statement, then that number is a solution of the equation or inequality.
That's the "solution" of the equation.
An equation has an equal sign, which means that we know what the variable is equal to :)