SOLUTION: a spice mixture is 25% thyme. How many grams of thyme must be added to 12 g of the mixutre to increase the thyme content to 40%?

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Question 362929: a spice mixture is 25% thyme. How many grams of thyme must be added to 12 g of the mixutre to increase the thyme content to 40%?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
12<==>.25<==>3
x<===>1.0<==>x
12+x<=>.4<=>.4(12+x)
.
3+x=.4(12+x)
3+x=4.8+.4x
.6x=1.8
x=3 gm of thyme.
.
Ed