SOLUTION: To build the garden of your dreams you need 12 m cubed of soil containing 85% silt. you have two types of soil you can combine to achieve this: soil with 40% silt & pure silt. How

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Question 1069899: To build the garden of your dreams you need 12 m cubed of soil containing 85% silt. you have two types of soil you can combine to achieve this: soil with 40% silt & pure silt. How much of each soil should you use?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
x, volume of 40% silt
12-x, volume of pure 100% silt

%2840x%2B100%2812-x%29%29%2F12=85


Why dividing by 12?

Remind yourself of what percent mean?
Numerator is expression for HOW MUCH silt.
Denominator is HOW MUCH VOLUME OF soil.


Example of the same type - one variable for two-part mixture