Question

A problem states: "There are 7 more girls than boys in a club. There are 23 members in the club in all. How many girls are there in the club?"

Let g represent the number of girls.

Which expression represents the number of boys?




g−7

g + 7

7−g

g⋅7






​​ ​x=−4​

​​ ​x=−3​

​​ ​x=−2​

​x=−1

Answer 1

Answer: g-7

Explanation:

g = number of girls in the club

b = number of boys in the club.

There are 7 more girls than boys in the club, therefore

g = b + 7

Subtract 7 from each side.

g - 7 = b + 7 - 7

g - 7 = b

That is,

b = g - 7

Answer: g - 7

Answer 2

Explanation:

Number of boys = g - 7.

g - 7 + g = 23

2g = 30

g = 15.

The are 15 girls in the class.