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(b•3+6)+b+(b•3+6-b):2=79

Răspuns :


(bx3+6)+b+(bx3+6-b):2=79

(3b+6+b+3b+6-b):2=79

(6b+12):2=79

6b+12=2x79

6b+12=158

6b=158-12

6b=146 , impartim la 2 si partea stanga si partea dreapta

3b=73

b=73:3

b= 24,3