Answer:
33cm ; 53 cm
Step-by-step explanation:
Let the length of one piece = x cm
Length of the other piece = (x + 20) cm
x + ( x+ 20) = 86 cm
x + x + 20 = 86
2x + 20 = 86
2x = 86- 20
2x = 66
x = 66/2
x = 33 cm
Length of the longer piece = x + 20 = 33 +20 = 53 cm
