Sagot :
Answer:
l = 17 inches, w = 10 inches
Step-by-step explanation:
P = 2(l +w)
l = w + 7
P = 54
Substitute
54 = 2(w + 7 + w)
54/2 = 2w + 7
Transpose
2w = 54/2 - 7
2w = 27 - 7
2w = 20
w = 20/2
w = 10 inches
Substitute w = 10 inches
l = w + 7
l = 10 + 7
l = 17 inches