algebra word problems
posted by mike on .
1) tina has 48 mL of a solution that is 25% acid. how much water should she add to obtain a solution that is 15% acid?
2) how many grams of sugar must be added to 60 grams of a 32% solution to obtain a 50% solution?
1. Let the amount to be added be x mL
solve .25(48) + x = .15(48+x)
2. Do it the same way