SOLUTION: How much clay do you need to add to 6 ft^3 of soil with 30% clay in order to make a soil with 72% clay? I suck at setting problems up, but can solve them fine. Having troubles w

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Question 433829: How much clay do you need to add to 6 ft^3 of soil with 30% clay in order to make a soil with 72% clay?
I suck at setting problems up, but can solve them fine. Having troubles with this one.
Thanks,
Tyler

Answer by jorel1380(2518) About Me  (Show Source):
You can put this solution on YOUR website!
x+6(.3)=.72(x+6)
x+1.8=.72x+4.32
.28x=2.52
x=2.52/.28=9 cu.ft. of 100% clay to get the desired mix..