Gabe Amodeo, a nuclear physicist, needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liter

Question

Gabe Amodeo, a nuclear physicist, needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liters of each does he need
to make the needed 60 liters of 60% acid solution?

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Savannah 1 month 2021-10-20T06:21:50+00:00 1 Answer 0 views 0

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    2021-10-20T06:23:37+00:00

    Answer:

    20 liters of the 40% solution

    60-20=40 liters of the 70% solution

    Step-by-step explanation:

    40%x+70%(60-x)=60%(60)

    0.4x+0.7(60-x)=0.6(60)

    0.4x+42-0.7x=36

    -0.3x+42=36

    -0.3x=-42+36

    -0.3x=-6

    0.3x=6

    3x=60

    x=60/3

    x=20 liters of the 40% solution

    60-20=40 liters of the 70% solution

    check: 0.4*20=8

    0.7*40=28

    8+28=36 and 0.6*60=36 also

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45:7+7-4:2-5:5*4+35:2 =? ( )