Question 845611
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Hi,
How much {{{ highlight_green(x)}}}of $3 coffee must be added to $10 coffee 
to create 50 pounds of coffee that can be sold for $5
  3x + 10(50lb-x) = 5(50lb)
  3x + 10(50lb)-10x = 5(50lb)
        5(50lb)/7 = x