Question 647416
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Hi,
 water = water, Let x = amount of water to be added
{{{ .50(9-x) + x = .80*9}}}
       {{{.5x = .30*9}}}
       {{{x = .30*9/.5}}}
            x = 5.4oz of water and 3.6 oz of the 50%solution of glucose
and...
  {{{.50*3.6 + 5.4 = 1.8 + 5.4 =  .80*9 = 7.2}}}