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a*c-11*b=1 si alta  2+(a+2+8:2)*2=22

Răspuns :

daca *=inmultire
prima nu stiu...
2+(a+2+8:2)*2=22
2+(a+2+4)*2=22
(a+6)*2=22-2
a+6=20:2
a=10-6
a=4