at a local fitness center, members pay a $14 membership fee and $2 for each aerobics class. nonmembers pay $4 for each aerobics class. for what number of aerobics classes will the cost for members and nonmembers be the same ?

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