Question

A math club has 40 members. The number of girls is 5 less than 2 times the number of boys. How many members are boys? How many members are girls?

Answer 1

Let b=# of boys
Let g=# of girls
B+g=40
G=2b-5
Sub g into first equation and solve for b
B+2b-5=40
3b-5=40
3b=40+5
3b=45
B=45/3
B=15
Sub B into the second equation
G=2b-5
G=2(15)-5
G=30-5
G=25
Hope this helps!