SOLUTION: 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

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Question 1197017: 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.
=_____LBS
Found 2 solutions by ewatrrr, josgarithmetic:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
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


Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
MATTER            QUANTITY
Iron                 F
Potassium           2F
Mulch              12F
Total  ------------  15

Question asks for 12F.
F%2B2F%2B12F=15
15F=15
F=1----------pounds of Iron

12F=highlight%2812%29---------pounds of mulch