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Afla cat este a in fiecare caz
10ori2+A=68
10ori9+a=98
46=80:2+a


Răspuns :

10*2+48=68
10*9+8=98
46=80:2+6


10x2+a=68             a=48

10x9+a=98             a=8

46=80:2+a              a=6