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rezolvati ecuatia 5x-70=80

Răspuns :

5x-70=80
5x = 80 + 70
5x = 150 x=150/5
x = 30

5x-70=80
5x=80+70
5x=150
x=150:5
x=30
Proba:
5×30-70=80
Demonstrarea
5×30-70=150-70 =80
Coroniță te rog