What would you do to isolate the variable in the equation below, using only one step? n−7=20

where are the images of the functions i can only see the question you typed.

step-by-step explanation:

i believe it's a.

i'm not sure on this one, most likely correct.

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2