Find the average value:
40 minutes + 50 minutes = 90 minutes
90 minutes/2 = 45 minutes
Together it will take them 45 minutes to clean the house
Step-by-step explanation:
sorry I wanted to help you but my calculator is take out decimals sorry I don't know what to do
6x + 45 + 3x = 180
9x - 45 = 180
9x = 135
x = 15
This was the answer I came up with - 3.5