SOLUTION: Loyola Heights has 3000 phones of which 3/5 are dial phones. If 2/3 of these dial phones are replaced by digital phones and 400 additional digital phones are installed, what fracti
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Question 854207: Loyola Heights has 3000 phones of which 3/5 are dial phones. If 2/3 of these dial phones are replaced by digital phones and 400 additional digital phones are installed, what fraction of the phones are digital now?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of dial phones
Let = number of digital phones
----------------
and
But now is less, so
400 additional digital phones are installed, so
Find
8/11 of the phones are digital
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