Which number can each term of the equation be multiplied by to eliminate the the fractions before solving

Draw a scaled copy of the circle using a scale factor of 2

Which expression is equivalent to -12(3x-3/4)

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