one bird has a mass of 600 g less than half the mass of a second. If their combined mass is 3900 g what is the mass of each bird?

Question

one bird has a mass of 600 g less than half the mass of a second. If their combined mass is 3900 g what is the mass of each bird?

Answer 1

x = y/2 - 600

x +y = 3900

y/2 -600 +y = 3900

3y/2 = 4500

y = (2/3)4500 = 3000 grams = mass of bird two

x = 1500 -600 = 900 grams = mass of bird one