SOLUTION: Prepare 60g of a 3% cream from a 1% cream and a 10% cream. How many ounces of each cream will you need to weigh out?

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Question 933342: Prepare 60g of a 3% cream from a 1% cream and a 10% cream. How many ounces of each cream will you need to weigh out?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let X be the amount of 1% cream.
Let Y be the amount of 10% cream.
1.X%2BY=60
.
.
1%28X%29%2B10%28Y%29=3%2860%29
2.X%2B10Y=180
Subtract eq. 1 from eq. 2,
X%2B10Y-X-Y=180-60
9Y=120
Y=40%2F3
Then,
X%2B40%2F3=60
X=180%2F3-40%2F3
X=140%2F3