Math class

There are a total of 30 students in a math class. The number of boys is 2 more than 3 times the number of girls. How many boys are in this math class?

Correct answer:

b =  23

Step-by-step explanation:

a+b=30 b=2+3a  b+(b2)/3=30  4b=92  b=492=23  b=23  a=(b2)/3=(232)/3=7

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