Answer :
If the perimeter is 16,
the possible length and width can be:
L=7,,W=1
L=6, W=2
L=5,W=3
IF L=4, AND W=4 WE HAVE A SQUARE
the possible length and width can be:
L=7,,W=1
L=6, W=2
L=5,W=3
IF L=4, AND W=4 WE HAVE A SQUARE
so 16=2l+2w
reverse distributive property which is ab+ac=a(b+c) so
16=2l+2w
16=2(l+w)
divide both sides by 2
8=l+w
you should put the values given, but they should add up to 8, and cannot be negative
so l+w=8