Elena’s bread recipe calls for 3 ounces of butter for each 4 cups of flour used. She needs to make 7 times the original recipe. If 12 ounces of butter is used, then how many cups of flour are needed?	Options:
A) 1
B) 4
C) 9
D) 13
E) 28
Solving through algebra route:   3B + 4F = x amount   If we multiply this equation with 7 we get:   21B + 28F 3  + 4= 
<gadget id="calculator">3  + 4</gadget>
<output>7</output>
x amount   If we multiply this equation with 7 we get:   21B + 28F=7X   Therefore, we got 21 ounces of butter and 7X amount of quantity when we use 28 ounces of floor.   Ans:28
<result>E</result>
Elena’s bread recipe calls for 3 ounces of butter for each 4 cups of flour used. She needs to make 7 times the original recipe. If 12 ounces of butter is used, then how many cups of flour are needed?