George has a certain number of apples, and Sarah has 4 times as many apples as George. They have a t

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George has a certain number of apples, and Sarah has 4 times as many apples as George. They have a total of 25 apples.

Let George's apples be g. Let Sarah's apples be s. We're give two equations:

1. s = 4g
2. g + s = 25

Substitute equation (1) into equation (2) for s:
g + 4g = 25

If we plug this equation into our search engine and solve for g, we get:
g = 5

Now substitute this into equation 1 for g = 5:
s = 4(5)
s = 20

So George has 5 apples and Sarah has 20 apples