Respuesta :

SaltySpark

Answer:

70

Step-by-step explanation:

Set up a system:

C + A = 105

C = 2A

Substitute:

3A = 105

A = 35

C = 70

meghayeddula24

Answer:

70 children 35 adults

Step-by-step explanation:

X= children

Y=Adults

x+y=105

1/2x=y

x+y=105

1/2x-y+0

x+y+105

x-2y=0

3y=105

y=35

x+35=105

x=70