The long piece of the board is 100 cm and the shorter board is 20. you can solve this by dividing 120 by 6 since u need to have a piece that is 5x a piece which is a total of 6 pieces. Then multiply that number by 5 and that is your longest board.
Answer: Order if operations
Step-by-step explanation:
15-10n+12n
15+12n
Extraneous Solutions maybe?
