Answer: width = 21, length = 47
Step-by-step explanation:
Length (L) = 2w + 5
width (w) = w
Perimeter (P) = 136
P = 2L + 2w
136 = 2(2w + 5) + 2w substituted the given values above
136 = 4w + 10 + 2w distributed 2 on the right side
136 = 6w + 10 added like terms (4w and 2w)
126 = 6w subtracted 10 from both sides
21 = w divided both sides by 6
Length (L) = 2w + 5
= 2(21) + 5
= 42 + 5
= 47
