A total of 3 + 2 = <<3+2=5>>5 slices of bread are consumed by each member every day.
So a family consumes a total of 5 x 4 = <<5*4=20>>20 slices of bread every day.
Five loaves of bread have 5 x 12 = <<5*12=60>>60 slices of bread.
Thus, the 5 loaves of bread last for 60/20 = <<60/20=3>>3 days.
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