400 in² = (20 in)²
The area of a square is the square of the side length.
The length of one of the sides is 20 inches.
The complement is 38
and the supplement is 128
<span>m-3x=2x+p
m-x=p (- 2x on both sides)
-x=p-m (- m on both sides)
answer: x=-p+m (divide -1 on both side)
</span>
7/8*8/9 = (7*8)/(8*9)
Since we have an 8 both above and below, we can erase it, and so the answer is 7/9
