I think you forgot to attach the image :(
Switch sides
Abc=d
Now divide both sides by bc to get a .
A= d/bc
Put 7 in place of x 10-2(7)= 10-14=negative 4
I'm gonna use c for circle, t for triangle, and s for square
c+t+s=13
t+s=8
c+8=13
c=5
c+t=7
t=2
s=6
circle is 5, triangle is 2, and square is 6
