The number of children at the library was 3 times the number adults. The total number of people at the library was 48. How many

Question

3 years ago

9

children were at the library
A 12

B 24

C 32

D 36

1 answer:

Rufina [12.5K] · Answer 1 · 2022-07-27T13:03:53+03:00

Answer:

D 36

Step-by-step explanation:

<em>Write the information algebraically</em>

c = 3a

c + a = 48

c = children, a = adults

<em>In the second sentence (in bold), we can replace c with 3a</em>

c + a = 48 → 3a + a = 48

<em>Simplify</em>

3a + a = 48 → 4a = 48 → a = 12 (divide both sides by 4)

<em>We can then substitute or plug in a = 12 into the original equation:</em>

c + a = 48 → c + 12 = 48 → c = 36 (subtract 12 from both sides)

<h3>There are 36 children</h3>