Question

Eunice and Belinda weighs 267 pound 6 ounces. Eunice and Laura weighs 223 pounds and 8 ounces. Laura weighs 136 pounds and 11 ounces. How much does Belinda weigh?

Answer 1

180 9/16 lb

Explanation:

Let the weights of the three girls be E, B and L.

Note that E + L = 223 8/16 lb, so subtracting L from both sides, that is, subtracting 136 11/16 lb from both sides, results in:

E = 223 8/16 lb - 136 11/16 lb = 86 13/16 lb

Thus, E's weight is 86 13/16 lb,

B's weight is 267 6/16 lb - 86 13/16 lb = 180 9/16 lb

L's weight is 136 11/16 lb.