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un tel si o tableta costa 1300lei iar 3 tel si 4 tab costa 4400lei ce pret are o tableta

Răspuns :

1 te+1 ta=1300
3 te+4ta=4400
2 te+3 ta=4400-1300=3100
1 te+ 2ta=3100-1300=1800
1 ta=1800-1300=500
1 te=1300-500=800