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Convert 40% oxygen to liters
Let L be the liters to be added. Then (L) x (0.2) + (40 x 0.9) = (L + 40) x 0.6 0.2L + 36 = 0.6L + 24 36 - 24 = (0.6 - 0.2)L 12 = 0.4L L = 12/0.4 = 120/4 = 30 Liters
The equation is as follows: 0.9(1) + 0.6(40) = 0.67x To solve we simplify: 24.9 = 0.67x Then Divide: 24.9/0.67 = x The Answer: 37 liters
Let x = the amount of 20% solution Let x + 10 = the amount of the final solution. So we have: (.20)x + (.50)(10) = (.40)(x + 10) .20x + 5 = .40x + 4 .20x = 1 x = 5 liters of 20% solution of saline.
40 litres of oil / 5 litres cans = 8 cans can be filled with 40 litres of oil.