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

g−7

7−g

Answer 1

Answer:

15 girl

b = g-7

Explanation:

Answer 2

Answer:
15 girl
b = g-7

To answer this question, you need to know how to translate the description into an equation. In this case, there is two equation which was: (g=girl, b=boy)
1. g=b+7
2. g+b=23

The 1st equation can be changed into b=g-7 which was express the number of the boy. If you insert this equation into second you will got the number of girls
g+b=23
g + (g -7)=23
2g= 30
g= 15