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#