Hello there! :D
Find the scale of the sides.
40/5=8 (the longer side is 8 times bigger than the shorter one)
3*8= 24
2x+10=24
Subtract 10 on both sides.
2x=14
Divide by two on both sides.
x=7
I hope this helps!
~kaikers
The answer is 9687.5
12.5 x 775 = 9687.5
9687.5/ 12= 775.
hopefully this helps u