SOLUTION: How many quarts of pure antifreeze must be added to 8 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?

Question 989340: How many quarts of pure antifreeze must be added to 8 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?

Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
8*10 + x*100 = (8+x)*20

Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
Follow this: Solve one material quantity given the other for a two-part mixture
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