P=2l+2w w=7 p=42 what is l

l = 14

Step-by-step explanation:

Given

p = 2l + 2w and w = 7, p = 42, substitute values into formula

42 = 2l + (2 * 7), that is

42 = 2l + 14 (subtract 14 from both sides)

28 = 2l (divide both sides by 2)

14 = l or l = 14

p=98

Step-by-step explanation:

p = 2 (7) + 2 (42)

p = 14+84

p = 98

l = 14