Answer:
It takes Evan
to mow the third lawn
Explanation:
Given that:
- It takes Evan 6 3/4 to mow 3 lawns
<=>

- It takes 2 1/3 hours to mow Mr. Gals lawn (first lawn)
<=>
- It takes 1 3/4 hot mow Ms. Lee’s lawn (second lawn)
<=>
Now,Time taken by Evan to mow the third lawn
=

=

=
It takes Evan
to mow the third lawn