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3xparanteza patrata 8+2x(5xn+27:3)paranteza patrata=16
8 trebuie facut prin metoda mersului invers va rog ajutatima imi trebuie pana maine


Răspuns :

3×[8+2×(5×n+27:3)]=168

8+2×(5×n+9)=168:3

8+2×(5×n+9)=56

2×(5×n+9)=56-8

2×(5×n+9)=48

5×n+9=48:2

5×n+9=24

5×n=24-9

5×n=15

n=15:5

n=3