Afarmer needs to mix 12 ounces of fertilizer for every 10 pounds of soil. how many pounds of fertilizer will the farmer need to make a mix that contains 120 pounds of soil?

The answer is 9 
     12 ounces x = 10 pounds of soil 120 pounds of soil Set the equation up as a proportion and solve for x: 10x = 1440 10 10 x = 144 ounces The question asks for the answer in pounds, and 16 ounces = 1 pound. 144/16 = 9

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm