if 4 gallons. of pure ethanol is added to 46 gallons of 2% ethanol how much of the final solution do you have? how much ethanol is contained in the mixture? what is the percentage of ethanol in the mixture

Is 8.50 an answer or no? ?

Iwould say always for the both of them

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.