+0

# algebra

0
104
1

How many liters of pure water should be mixed with a 30L solution of 60% acid to produce a mixture that is 70% water?

Oct 1, 2020

#1
+10787
+1

How many liters of pure water should be mixed with a 30L solution of 60% acid to produce a mixture that is 70% water? How many liters of pure water should be mixed with a 30L solution of 60% acid to produce a mixture that is 70% water?

Hello Guest!

$$x+30l\cdot (100-60)\%=(30l+x)\cdot 70\%$$

$$x+30l\cdot 0.4=30l\cdot 0.7+0.7x\\ x-0.7x=30l\cdot (0.7-0.4)\\ 0.3x=0.3\cdot 30l$$

$$x=30l$$

30 liters of pure water should be mixed with a 30L solution of 60% acid to produce a mixture that is 70% water?

!

Oct 1, 2020