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Algebra
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If you prepare 500 ml of 12.5% dextrose using D10W and D20W, how much is needed

Jan 31st, 2015

Let  a= amount of D10W  and b = amount of D20W

a+ b =500  [500ml is total]

0.1 a + 0.2 b = 62.5   [ total amount of dextrose must be the same]

multiply 2nd equation by 10:     a + 2b = 825

                                          and   a + b  = 500


subtracting gives                              b = 125

                                 and                  a = 375      [a+b =500]          

use 375 ml of D10W and 125 ml of D20W

Jan 31st, 2015

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