Mr. Wang has 60 grams of 90% alcohol. How many grams of water should be added to dilute him to 50% alcohol? To understand some of the stupid level. Thank you!

Mr. Wang has 60 grams of 90% alcohol. How many grams of water should be added to dilute him to 50% alcohol? To understand some of the stupid level. Thank you!

60 △ 90% = 54 g alcohol content
Dilute to 50% alcohol, alcohol content unchanged, just add water
54 △ 50% = 108 alcohol after adding water
108-60 = 48g of water should be added

How many kg of water is needed to dilute 360 kg of 95% alcohol into 75% alcohol solution?

Let X be added
95%*360=75%*(X+360)

500 ml 95% alcohol add how many ml of water can be diluted into 70% alcohol?

500*95%=(500+x)*70%
Solve the equation by yourself