Question

there are b boys in the class this is three more than four times the number of girls how many girls are in the class

Answer 1

Answer:

There are b−3/4 girls in the class.

Explanation:

As boys are three more than four times the girls and there are b boys, let us first reduce 3 from b which gives us (b−3) boys.

As such (b−3) must be four times number of girls.

Hence, there are b−3/4 girls in the class.

Answer 2

let x represent the unknown number that you are asked to find:  Let x be the number of girls.

(Although b is not known -- it is an arbitrary constant -- it is not what you are asked to find.)

The problem states that "This" -- b -- is three more than four times x:

 4x + 3 = b.  

 Therefore,

 4x = b − 3  

 

x = b − 3

  4 .

The solution here is not a number, because it will depend on the value of b.  This is a type of "literal" equation, which is very common in algebra.

Hope it helps u dear