A mother weighs 100 lbs more than the combined weights of her baby and her god. Together, all three weigh 172 lbs. Her dog weights 40% of the weight of the baby. How much does the baby weigh?
Let the baby's weight =B Dog's weight =0.4B Mother's weight =B +0.4B + 100 (B +0.4B + 100) + B + 0.4B =172 2.8B =72 B = 72 / 2.8 B = 25 5/7 lbs - Baby's weight 25 5/7 x 40% =10 2/7 lbs - dog's weight 100 + 25 5/7 + 10 2/7=136 lbs - Mother's weight
