in one year,michael read 18 books.this was four fewer than twice the number of books jeff read.how many books did jeff read?

Question

how do i solve this question?i need help

 

Answer 1

To solve this, we need a system of equations. Let's look at what we know:

m = 18 (Michael read 18 books)

m = 2j - 4 (Mike read 4 less than twice Jeff's)

 

We have a value for Mike, so let's plug it in:

18 = 2j - 4

 

All you need to do from here is isolate j. Start by adding 4 to both sides:

18 + 4 = 2j - 4 + 4

22 = 2j

Divide by 2:

22 / 2 = 2j / 2

11 = j