Question

Find the missing length, when you know the perimeter. 9m + 9m + ? + ? = 42m

Answer 1

The missing length is 12 meters.

Explanation:

9+9+x+x=42

Subtract 9 from both sides

9+x+x=33

Subtract 9 from both sides

x+x=24

2x=24

Divide both sides by 2

x=12

The missing length is 12 meters.

Answer 2

MISSING LENGTH IS 12 M

Explanation:

9+9+ ? + ? = 42m

18+ X + X = 42m

2X=42-18

2X=24

X=12