If I'm understanding the question correctly, 7+3=10. 10*8=80.
P = L + L + w + w
72 = 2(L) + 2(L-4)
Distribute
72 = 2(L) + 2(L) - 8
Add like terms
72 = 4(L) - 8
Subtract 8 from both sides
64 = 4(L)
Divide both sides by 4
16 = L
The length is 16. Now substitute that in the equation for finding w.
w = L - 4
w =
2 1/2 for $6.25 is the answer
30. You’d do 180 divided by 6 :)
