Answer:
rise over run
Step-by-step explanation:
how much it goes up over how far it goes to the side
X+10=18. |-10 from both sides
x+10-10=18-10
x=8

First I found the number of adults by multiplying .60 by 700. It was 420. From there all I had to do was subtract it from 700. Revealing the number of children to be 280.