Michael J. answered • 09/27/15

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If we add the number of students in each of the 4 teacher's home, we get a total of 90.

b + 15(b + 2) + 15 + 2b - 9 = 90

b + 15b + 30 + 15 + 2b - 9 = 90

Solve for b.

Combine like terms to simplify the equation.

18b + 36 = 90

Subtract 36 on both sides of the equation.

18b = 54

Divide both sides of the equation by 18.

b = 3

Since the number of students in Mr.Boggs house is represented by b,

there are 3 students in his house.