Answer:
3
Step-by-step explanation:
y=7-4
y=3
N= night c= child
sandy= $10+$5c
kimmi= $25n
if sandy babysits 3 children for one night they will both be the same price
sandy= $10+5(3)=$25
kimmi= $25
The answer is y = -2x + 10
80=x+3x
80=4x
20=x
There are 20 girls.
