The total length of 3 ribbons is 185 cm. The length of one of the ribbons is 75 cm. What is the average length of the other 2 ribbon?
Let x be the average length of the other 2 ribbons.
We can set up the following equation:
75 + x + x = 185
Simplify the equation:
75 + 2x = 185
2x = 185 - 75
2x = 110
x = 55
Therefore, the average length of the other 2 ribbons is 55 cm.