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daca 17-a+3-5+8=14, atunci=?

Răspuns :

17-A+3-5+8=14 17-A+3-5=14-8 17-A+3-5=6 17-A+3=5+6 17-A+3=11 17-A=11-3 17-A=8 A=17-8 A=9