SOLUTION: Sidney can mow the law in 4 hours using her riding mower. Her son can mow the same lawn in 12 hours using a push mower. How long would it take to mow the lawn working together?

SOLUTION: Sidney can mow the law in 4 hours using her riding mower. Her son can mow the same lawn in 12 hours using a push mower. How long would it take to mow the lawn working together?

Algebra.Com

Question 806929: Sidney can mow the law in 4 hours using her riding mower. Her son can mow the same lawn in 12 hours using a push mower. How long would it take to mow the lawn working together?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x/4+x/12=1
3x/12+x/12=1
4x/12=1
x/3=1
x=3

RELATED QUESTIONS
Lynn can mow the lawn in 3 hours using a riding lawn mower. Her brother can mow the... (answered by venugopalramana)

lynn can mow the lawn in 3 hours using a riding lawn mower. Her brother can mow the same (answered by checkley71)

A lawn can be mowed in 20 minutes less time with a riding mower than a push mower. After... (answered by josgarithmetic,MathTherapy)

a push mower can mow a large area for 6 hours where as a mower with a riding mower van... (answered by josmiceli)

When Mike uses a riding mower, it takes him 3 hours to mow his lawn. When he uses a push (answered by ewatrrr)

I want to mow my lawn this summer but I need a new lawn mower. I can choose a riding... (answered by stanbon)

Using a new lawn mower, Abby can mow the lawn in 2 hours. Her sister Carla uses an older... (answered by bucky)

I want to mow my lawn this summer but I need a new lawn mower. I can choose a riding... (answered by stanbon)

Katrina can mow the lawn in 2 hours. It takes her brother 3 hours to mow the lawn. When... (answered by stanbon)