exam Maths Puzzle Numerical Ability

How many gallons each of 25% alcohol and 35% alcohol should be mixed to get 20 gallons of 32% alcohol?

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Write the fractions in simplist form.

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7x-21 OVER x squared + x-12 Bittman Coffee Company is introducing two new blends to its gourmet coffee line: Premium and Deluxe wich sell for $12.00 and $9.00 per pound, respectively. Both coffees are made f