Superstore and cheap store are two supermarkets that sell boxes of the same type of cereal each supermarket has a special offer which box of cereal is better for the value of money cheap store 600g 20% of the normal price of £5 superstore 600g + 30% extra £5

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters