<PRE><B>Question 1152266</B>
x, how many ounces of the $1 per ounce herbs


x+30, amount of mixture, ounces


{{{(30*4+x)/(x+30)=2.5}}}



{{{x+4*30=2.5(x+30)}}}

{{{x+4*30=2.5x+2.5*30}}}

{{{4*30-2.5*30=1.5x}}}

{{{highlight(x=30)}}}




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Look at the two prices.  The middle of $4 and $1 per ounce is  $2.5 per ounce.  You want equal amounts of the two ingredient herbs to get that middle price.</PRE>