Write the given:
if one angle of a triangle is 90 degrees, then the other two add to 90 degrees.
given:
a.) one angle of a triangle is 90
b.) the other angles add up to 90
c.)

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