The visitors who were 18 or younger were: 42
Step-by-step explanation:
Let x be the number of visitors above 18 years
and
y be the number of visitors 18 or younger
Then according to given statements,
x+y = 224 Eqn 1
12x+8y = 2520 Eqn 2
From equation 1:
[tex]x = 224-y[/tex]
Putting in equation 2:
[tex]12(224-y) + 8y = 2520\\2688-12y+8y = 2520\\2688-4y=2520\\-4y = 2520-2688\\-4y = -168[/tex]
Dividing both sides by -4
[tex]\frac{-4y}{-4} = \frac{-168}{-4}\\y = 42[/tex]
Hence,
The visitors who were 18 or younger were: 42
Keywords: Linear equations, variable
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