Destinyyyy
  • Destinyyyy
A chemist needs 190 milliliters of a 47% solution but has only 25% and 63% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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perl
  • perl
If we assume that x = number of milliliters of 25% solution y = number of milliliters of 63% solution x + y = 190 .25x + .63y = 190 * .47
Destinyyyy
  • Destinyyyy
Okay
Destinyyyy
  • Destinyyyy
I match up the y's to cancel them out correct?

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More answers

perl
  • perl
yes, you can solve by substitution or elimination
Destinyyyy
  • Destinyyyy
I got x=317.38 which cant be correct
perl
  • perl
x + y = 190 .25x + .63y = 190 * .47 multiply the second equation by 100. that will get rid of decimals. x+y=190 25x + 63y = 8930
Destinyyyy
  • Destinyyyy
x=-230 then I plug this into x+y=190
perl
  • perl
x should be positive
Destinyyyy
  • Destinyyyy
Yes ... For x+y=190 times it all by -63 to cancel out the ys ... But then I get -38x=8740
perl
  • perl
Did you get this? -63x -63y = -11970 25x + 63y = 8930
perl
  • perl
I multiplied first equation by -63
Destinyyyy
  • Destinyyyy
-.- oh my gosh i left it as -190
perl
  • perl
:D
Destinyyyy
  • Destinyyyy
x=80 and y=110
Destinyyyy
  • Destinyyyy
Thank you!

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