How many liters of 20% alcohol solution must be mixed with 60 liters of a 90% solution to get a 70% solution
1 answer:
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Answer:
A)
Step-by-step explanation:
We are trying to find how long it will take Carlos to have $500 TOTAL, so we need to subtract what he already has ($150) to get the value we want to divide by $25 to figure out how many months it will take him to save up the rest. The given answer above is just a simplified way of writing , if that makes more sense.