Answer:
8 cm
Step-by-step explanation:
The perimeter of a rectangle is found by
P = 2(l+w) where l is the length and w is the width
We are given l = x+3 and width is x and the perimeter is 26
26 = 2( x+3 +x)
Combine like terms
26 =2(2x+3)
Divide each side by 2
26/2 =2/2(2x+3)
13 = 2x+3
Subtract 3 from each side
13-3 = 2x+3-3
10 =2x
Divide each side by 2
10/2 =2x/2
5 = x
We want to find the length
length = x+3
= 5+3
=8 cm
