Answer: The two different addition equations that describes the given situation are,
w = 2 b
b + w = 150
Explanation:
Here, w represents the number of woodwinds and b represents the number of brass instrument.
Since, There are twice as many woodwind instruments as brass instruments,
⇒ w = 2b
And, The total number of instruments = 150
⇒ w + b = 150
Hence, the equations that shows the given situation are,
w = 2 b, b + w = 150