20% is alcohol and 80% is water hope this helped
Alright here it is:
-2/7x + y = -7
The literal equation for x is
given that 
The subject of a formula is a way of representing a variable in terms of other variables.
Given the equation

Factor out the common variable x

Divide both sides by 4+5y

This shows that the literal equation for x is 
Learn more here: brainly.com/question/21140562