problemahhh

  1. CONFUSED_ONE

    Word Problem....ahhh

    A chemist at a university needs to mix a 25% ethanol solution with a 40%ethanol solution to obtain 120mL of a 30% ethanol solution. How much of each kind is needed? okay yeah, the two equations i got out of this was .25a+.40b=120--->25a+40b=12000 a+b=120(.30)---->a+b=36...