The answer is d because the centroid stems from medians in a triangle
I got x=18
3(x-4)-2(3x+4)=4(3-x)+5x+4
3x-12-6x-8=12-4x+5x+4
3x-20=16+x
2x=36x
x=18
Well if you know the top and the bottom are equal and the two sides are equal. So just add them up
36 divided by 140=26% rounded
So you end up with 26% that were Canadian
