Answer:
Step-by-step explanation:
1st one is x=26
2nd one is x=4
3rd is x=4
4th is x=-1
Hope that helps!
Answer:
8.56
Step-by-step explanation:
Answer:
If you add 690 ml of water you will obtain 1.690 liter of 70% alcohol. Of course if you halve the amounts, e.g. 0.5 liter 75% alcohol and 345 ml of water, you will also obtain 45% alcohol solution.