Write and solve the equation and then check your answer. Write and solve the equation and then check your answer.

The difference between a number and four hundred forty is five hundred eighty-five.

Complete the statements.

The equation that correctly models the problem is
.
To undo what has been done to the variable,
both sides of the equation.
The solution of the equation is
.
Check the solution by substituting
for the variable and simplifying.