kayleebug13
04.07.2019 •
Mathematics
Ascientist needs 60 liters of a 40% acid solution. he currently has a 20 % solution and a 50 % solution. how many liters of each does he need to make the needed 60 liters of 40% acid solution?
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Ответ:
percent quantity
Acid type I 60.00% x liters
acid type II 30.00% 60 - x liters
Mixture 40.00% 60
Total 60 liters
60.00% x + 30.00% ( 60 - x ) = 40.00% * 60
60 x + 30 ( 60 - x ) = 2400
60 x + 1800 - 30 x = 2400
60 x - 30 x = 2400 - -1800
30 x = 600
/ 30
x = 20 liters 60.00% Acid type I
40 liters 30.00% acid type II
brainliest plzz
Ответ:
a
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