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Daca a+b=24 so a=12+5b, atunci b este legal cu:
A)10; B)6; C)2; D)4;
Repede


Răspuns :

a+b=24; a=12+5b; Inlocuim a in relatie: 12+5b+b=24; 12+6b=24; 6b=24-12; 6b=12; b=12:6; b=2; Raspuns corect:c
12+5b+b=24 =>>>>>>>>>>>> b=2