Answer:
Boys = 150
Girls = 315
Total Boys and Girls 465
Explanation:
We call x the number of boys and we call y the number of girls.
So we have to find the total number of children
We know that


Now we substitute the second equation in the first and solve for y.


Now we find x.

Finally we have that:
Boys = 150
Girls = 315
Total Boys and Girls 465