$\"\"$

The equation is $\"\"$ .

$\"\"$ minus what number equals to $\"\"$ ? (Write the equation as a question)

The solution is $\"\"$ . $\"\"$

Check whether $\"\"$ is a solution.

$\"\"$ (Write the equation)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Product of two different signs is positive) \ \

$\"\"$ (Add: $\"\"$ )

$\"\"$ is the solution of the equation. $\"\"$

$\"\"$ is the solution of the equation.