A chemistry student needs to make 60 liters of a 30% alcohol solution. He has a 20% alcohol solution and a 40% alcohol solution in the lab. How many liters of each strength does he need to mix together
*The system of equations I did was: a+b=60 & .2a+.4b=18. I may be wrong but i seriously need help
2 answers
You are seriously right in your equations.
then a = (60-b)
.2(60-b) + .4 b = 18
12 - .2 b + .4 b = 18
.2 b = 6
b = 30
a = 30
.2(60-b) + .4 b = 18
12 - .2 b + .4 b = 18
.2 b = 6
b = 30
a = 30
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