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Cit face
5*(6+2*x)=60


Răspuns :

6+2*x=60:5=12
2*x=12-6=6
x=6:2=3
Raspuns: x=3
[tex]\displaystyle 5(6+2x)=60 \\ 30+10x=60 \\ 10x=60-30 \\ 10x=30 \\ x= \frac{30}{10} \\ \boxed{x=3}[/tex]