It takes 3 hours for Marty and Cora to weed a garden. How long will it take 6 people to weed the same garden, if they work at the same constant rate?

Me because some of question i don’t understand

What is the value of x in the equation7x+2y=48 when y=3

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?