from the left side we can see the whole side is 30yd long. On the right we see its only 10 yd, meaning the triangle takes up the remaning 20yds. The whole bottom line equals 40 yd. The top line is only 20yd, leaving the other 20yd for the triangle.
You would do the inside first so first you would do (8-3)x2 which would give u 10 then you would do (5x6)-5 which is 25 after tht u would add 25+10 which =35 after tht u would do 35/5 and u would get 7
