a large fry has 120 more calories than a small. 5 large fries is the same amount of calories as 7 sm

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a large fry has 120 more calories than a small. 5 large fries is the same amount of calories as 7 small. How many calories does each size fry have?

Let the number of calories in large fries be l. Let the number of calories in small fries be s. We're given two equations:

1. l = s + 120
2. 5l = 7s

Substitute equation (1) into equation (2):
5(s + 120) = 7s

Type this equation into the search engine and we get:
s = 300

Substitute s = 300 into equation (1):
l = 300 + 120
l = 420