SOLUTION: How much sand must be added to 250 lb of a cement mixture that is 22% to have a mixture that is 25% sand?

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Question 1196377: How much sand must be added to 250 lb of a cement mixture that is 22% to have a mixture that is 25% sand?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
How much sand to add, x;

%28x%2B0.22%2A250%29%2F%28x%2B250%29=0.25
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