College Algebra

Question

How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is

35%

​antifreeze?

Answer 1

how much water to add to 1 gallon of pure anti freeze to get 35% antifreeze??

1(100) = x(0) = (1+x)(35) = 35 +35x

100-35 = 35x

35x = 65

7x = 13

x = 13/7 = 1 6/7 gallons of pure water