## Answer :

10 - x = amount of 18% bleach to add

.18(10-x)= .12 x 10

1.8 -.18x =1.2

-.18x = -.6

x = 3 1/3 liters water

therefore 6 2/3 liters bleach

10 - x = amount of 18% bleach to add

.18(10-x)= .12 x 10

1.8 -.18x =1.2

-.18x = -.6

x = 3 1/3 liters water

therefore 6 2/3 liters bleach