Use complete sentences to describe why it is necessary to do the same thing to both sides of an equation to perform valid operations.

An equation normally contains an equality sign which signify that both sides of the equation is the same. If an operation is performed on one side then the same has to be done to the other side of the equation to keep them equal.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.