How do you write an equation from the phrase "Seven less than twice a number equals 19"?

2 Answers
Apr 8, 2018

2n-7=19

Explanation:

Twice a number n means n+n, or 2*n

An amount (in this case, seven) less than a number means that number subtracted by the amount (seven)

7 is being subtracted from 2n

2n-7=19

Apr 8, 2018

2n-7=19

Explanation:

Well first we should look at the part that says "twice a number"

This number can be anything so let's assign a variable to it
Let n = a number

And we also see at the end "twice a number equals 19"

So we get 2n=19

Then we see that "Seven less than" 2n all equals 19

So we get

2n-7=19

Now if you would want to solve this equation you first add 7 to both sides and we get 2n=26

Then we divide both side by 2

So n = 13