SOLUTION: How many cups of chocolate chips must be added to 60 cups of cookie dough that is 4% chocolate chips, so that the percentage of chocolate chips in the resulting mixture will be 10%

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Question 833309: How many cups of chocolate chips must be added to 60 cups of cookie dough that is 4% chocolate chips, so that the percentage of chocolate chips in the resulting mixture will be 10%?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.04*60+x=.10(60+x)
2.4+x=6+.1x
x=4