In a survey of 105 people, there were half as many adults as children. How many children were there?

Question

Mathematics

Cold Brew

31 August, 23:03

In a survey of 105 people, there were half as many adults as children. How many children were there?

+3

Answers (2)

Know the Answer?

Ralph · Answer 1

70

Step-by-step explanation:

Set up a system:

C + A = 105

C = 2A

Substitute:

3A = 105

A = 35

C = 70

Isai Crosby · Answer 2

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