Is there more context to the question?
Solve for y like the top equation:
2y = -4ax + 11
2y/2 = -4ax/2 + 11/2
y = -2ax + 11/2
So to do that, find the point of S then transform
in (x,y) form
we see that the point 'S' is 1 unit to the right and 2 units up therefor
the point is (1,2)
so we jsut apply the thingy translation to is
x=1
y=2
x+2=1+2=3
y-1=2-1=1
the new point is (3,1)
4/9 x 27 = girls
12 girls
5/9 x 27 = boys
15boys