How many more books do you need to read over the summer if you already read 4 books and you need to read a total of 16 books? Write an equation to represent this situation and solve the equation using mental math.
Your equation must have a variable and and equal sign. Write your answer in a complete sentence.
You don't have to answer the question, but just please help me understand how to do it. :)
That makes no sense
You've been given a start -- a variable (letter) and an equal sign
n =
What do you need to add to that to make a complete equation?