Which shows how to solve the equation -4/5x=80 for x in one step?

There are no options to choose from, but here is what it should look like:

-4/5x=80
divide both sides by -4/5

x= 80 ÷ -4/5 (step 1)

to divide fractions, multiply by the reciprocal/inverse of -4/5

x= 80 * -5/4 (step 2 - if your listed options skip step 1)

If you have to also solve:
x= (80*-5)/4

x= -400/4

x= -100

ANSWER: B) -4/5(-5/4) x =80(-5/4)
Hope this helps! :)