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How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid to obtain a mixture containing a 40% solution of acid?

Respuesta :

suneetarednam

Answer:

x=40

Step-by-step explanation:

0.50x + 20(0.20) = 0.40(x + 20)

0.5x+4=0.4x+8

0.1x+4=8

0.1x=4

x=40

s1988083

Answer:

40

Step-by-step explanation:

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