Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rate, takes x hours to create a widget. Working together, Machine A and B take 12 hours to build two widgets. What is the value of x?

Guest Mar 16, 2020

#1**+1 **

This makes no sense.....'A' working alone can create FOUR widgets in 12 hours......why would adding B slow it down?

Is it supposed to be 1/2 hour instead of 12 hours??????

ElectricPavlov Mar 16, 2020

#2**+1 **

Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rate, takes x hours to create a widget. Working together, Machine A and B take 12 hours to build two widgets. What is the value of x?

**Machine B is 3X slower than machine A**

**3 + x = 12 x = 9 **

Dragan Mar 16, 2020