<PRE><B>Question 1197017</B>
 A ground supplement that weighs 15 lb contains iron, potassium, and mulch. 
The supplement contains twelve times as much mulch as iron 
and twice as much potassium as iron.
Find the amount of mulch in the soil supplement. 
Let x be the amount in lbs of iron
Mulch + Potassium + Iron = 15lbs
12x + 2x + x = 15lbs
   15x = 15lbs
     x = 1 lb  and Mulch = 12(1lb) = 12 lbs

checking
12 lb + 2 lb + 1 lb =  15 lb checks


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