How many mls of a syrup containing 85% of sucrose should be mixed with 150ml of a 60%sucrose syrup to make a syrup containing 80% sucrose?

Answer 1

.85x + .60*150 = .80(x+150)
.85x + 90 = .80x + 120
.05x = 30
x = 600

so, add 600ml of 85% syrup to 150ml of 60% syrup

Answer 2

400