How many grams of 65% and 50% acid is to be mixed to give 240 g of acid with a concentration of 60%?

Correct answer:

a =  160 g
b =  80 g

Step-by-step explanation:

m=240 g  a+b=m 65a+50b=60 m a+b=240 65a+50b=60 240  a+b=240 65 a+50 b=60 240  a+b=240 65a+50b=14400  Pivot:Row1Row2 65a+50b=14400 a+b=240  Row2651 Row1Row2 65a+50b=14400 0.23b=18.46  b=0.2307692318.46153846=80 a=651440050b=651440050 80=160=160 g  a=160 b=80

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