# SOLUTION: how many gallons of a 70% acid solution must be mixed with 30 gallons of a 24% solution to obtain a solution that is 60% acid?

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 Question 234753: how many gallons of a 70% acid solution must be mixed with 30 gallons of a 24% solution to obtain a solution that is 60% acid?Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!.70x+.24*30=.60(30+x) .70x+7.2=18+.6x .70x-.60x=18-7.2 .1x=10.8 x=10.8/.1 x=108 gallons of 70% acid is used. Proof: .70*108+.24*30=.60(30+108) 75.6+7.2=.6*138 82.8=82.8