Question

A problem states: "There are 9 more children than parents in a room. There are 25 people in the room in all. How many children are there in the room?"

Let c represent the number of children.

Which expression represents the number of parents?

Answer 1

c = p + 9
c + p = 25

p + 9 + p = 25
2p + 9 = 25
2p = 25 - 9
2p = 16
p = 16/2
p = 8 <== 8 parents

c = p + 9
c = 8 + 9
c = 17 <== 17 kids