Question 243076
you own a bakery and have a special recipe that calls for a dough that starts with a 80% flour to 20% sugar mixture. 
An employee incorrectly mixed 15 pounds of the mixture at a 70% flour to 30% sugar ratio. 
How much flour must you add to the incorrect mixture so that the ratio of flour to sugar is corrected.
Equation:
flour + flour = flour
0.70*15 + 1.00x = 0.80(15+x)
Multiply thru by 100 to get:
70*15 + 100x = 80*15 + 80x
20x = 10^15
x = 7.5 lbs (amount of flour that must be added to the mixture)
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How many pounds of the new mixture will there be.
7.5 + 15 = 22.5 lbs.
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Cheers,
Stan H.