Question 451678
x+y=1
.60x+.85y=.75
60x+85y=75
60x+60y=60
25y=15
y=15/25=3/5
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85x+85y=85
60x+85y=75
25x=10
x=10/25=2/5
The baker needs to use 2 parts of 60% cocoa for every 3 parts of 85% cocoa in his recipe..