# Bag

Nelly found interesting point. An empty bag weighs 4 kg less than full. And empty bag is 5 times easier than full. How many kg weigh things in this bag?

x =  4 kg

### Step-by-step explanation:

t+4=t+x
t = (t+x)/5

x = 4
4t-x = 0

t = 1
x = 4

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