loly beought a bag of hummy bears and ate one third of them the next say she ate 16 more hummy bears if she ate a total of 37 gummy bears how many were originally in the bags ps i need equations​

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