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

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Question 389319: A spice mixture is 25% thyme. How many grams of thyme must be added to 12g of the mixture to increase the thyme content to 40%?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
0.25(12) + 1.00(x) = 0.40(12 + x);
3 + x = 4.8 + 0.40x;
0.60x = 1.8;
x = 3 grams, the amount of pure thyme that must be added to increase thyme content to 40%