Question

Help........Write an equation and solve:

Answer 1

5 months

Explanation:

Equate the formulas for the weights of the two boys:

J's weight = 120 lb + (10 lb/mo)m = D's weight = 150 lb + (4 lb/mo)m

Solve as follows: Subtract 120 lb from both sides:

(10 lb/mo)m = 30 lb + (4 lb/mo)m.

Then: (6 lb/mo)m = 30 lb, and m = (30 lb) / (6 lb/mo) = 5 months