Answer:
1
Step-by-step explanation:
The answer is 10
Explanation: First you cross-multiply to get 2x=20 and then divide by 2 to get x=10
Answer How many liters of a 20% acid solution should be mixed with 30 liters of 50% acid solution in order to obtain a 40% solution. ... x=15 liters 15*(.20 pure acid)=3 liters 30*(.50 pure acid)=15 liters That is 18 liters pure acid That is 45 liters solution *0.45 pure acid=18 liters.
As more pure acid is added, the concentration of acid approaches 0.
<span>1. -7/9 = -0.77777777777
2. 11/15 = 0.73333333333
3. 8/3 = 2.666666666666</span>
