Arturo and Marcus both leave the study group at the same time, but in opposite directions. If Marcus travels 6 mph faster than Arturo and after 8 hours they are 144 miles apart, how fast is each traveling? Arturo is traveling mph.

Marcus is traveling mph.

a. 70 gallons of water were leaked each month.

Step-by-step explanation:

Set up an equation:

Variable x = gallons leaked each month

210/3 = x/1

Cross multiply:

210 × 1 = 3 × x

210 = 3x

Divide by 3 to isolate the variable:

70 = x

The division part is only 210 ÷ 3 = x. I wrote it down this way so you can see how I came to this equation.

Check your work:

210/3 = 70/1

210 × 1 = 3 × 70

210 = 210

Correct!