At a country concert the ratio of the number of boys to the number of girls is 2:7 if there are 250 more girls than boys how many boys are at a concert

At the country concert, the ratio of boy to girls = 2 : 7

Now, there are 250 more girls than boys, how many boys are there in the concert.

the equation would be like this:

Let x = girls

Let y = boys

=> y / x = 2/7

=> y + 250 = x

=> y + 250 = 7/2y

=> y = 100

The number of boys is 100

=> x = 100 + 250

=> x = 350, the number of girls.