Answer:
Step-by-step explanation:
It's hard to tell what you mean. I'm going to assume you mean that you want what is left to be 3/7 less.
1400 - 3/7 1400 = 1400 - 600 = 800
You would square 3968 and subtract 1.
Assuming you are talking about the rectangle,
width = area/lenght
3+2=5
5x=100%
x=20 (divide)
20*3=60
60% are boys, 40% are girls
3-5w+12+2w-3
(3+12-3)=12
(-5w+2w)=-3w
-3w+12