A high school graduating class is made up of 440 students. There are 168 more girls than boys. How m

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A high school graduating class is made up of 440 students. There are 168 more girls than boys. How many boys are in the class?

Let b be the number of boys and g be the number of girls. We're given 2 equations:

1. b + g = 440
2. g = b + 168

Substitute (2) into (1)

b + (b + 168) = 440

Combine like terms:
2b + 168 = 440

Type this equation into the search engine, and we get:
b = 136