Answer:
15x + 24y <= 120
Step-by-step explanation:
It takes 15 minutes per oil change, 15x
It takes 24 minutes per tire change, 24y
In at most 120 minutes, so it must be less than or equal to the time available.
you start with 60 and 15 of them like green.
you need to put 15 over 60 because that is how many people that like green.
15/60.... then you need to simplify
which would be 1/4
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To find y, divide the first equation by 2.
y = 4
To find x, use that value for y in the second equation. Add 4, then divide by 2.
15·4 = 2x -4
60 +4 = 2x
64/2 = x = 32
The solution is (x, y) = (32, 4).