The perimeter is found using 2L + 2W.
The perimeter needs to equal 60 inches.
2L +2W = 60
She wants L to equal W+2
replace L with w+2 and solve:
2(W+2) +2W = 60
Use Distributive Property:
2W+4 +2W = 60
Combine like terms:
4w +4 = 60
Subtract 4 from each side:
4w = 56
Divide both sides by 4:
W = 56 / 4
W = 14
L = W+2 = 14 +2 = 16
The frame would be 16 inches long by 14 inches wide.
