Aclassmate asks you to him check his math problem. he has been working on the following equation: 7x - 5 = 10 +4x. he claims the answer to this problem is 4. which of the following situations models the best way to determine if your
classmate's answer is correct?
a) solve the problem for yourself, and see if your answer matches your classmate's answer.
b) replace the variable in the equation with 4 simplify each side of the equation to determine whether or not it is a true statement.
c) divide both sides of the original equation by 4.
d) in the equation, divide each of the variable terms by 4. then, multiply each side of the equation by 2.