Question

The linear equation shown below expresses the revenue of a café based on the number of children and adults who ate there last Tuesday.

10x + 15y = 180

x = number of children

y = number of adults

If 10 adults ate at the café that day, how many children also ate there?

Answer 1

3 children also ate there.


Hope this helps!

Answer 2

3 children ate there.

Explanation:

Given linear equation that shows the revenue of a café based on the number of children and adults who ate,

10x + 15y = 180

Where, x represents number of children,

y represents number of adults,

If y = 10,

Then from the above equation,

10x + 15(10) = 180

10x = 180 - 150 = 30

x = 3

Hence, 3 children ate there.