Question

Va rog dau coroana!!

Answer 1

Răspuns:

Ceea ce am putut am făcut (:

Answer 2

3.

$\it \{[(x+3)\cdot2-1]:5-4\}\cdot3+2=23\Big|_{-2} \Rightarrow \{[(x+3)\cdot2-1]:5-4\}\cdot3=21\Big|_{:3} \Rightarrow\\ \\ \\ \Rightarrow [(x+3)\cdot2-1]:5-4=7\Big|_{+4} \Rightarrow [(x+3)\cdot2-1]:5=11\Big|_{\cdot5} \Rightarrow \\ \\ \\ \Rightarrow (x+3)\cdot2-1=55\Big|_{+1} \Rightarrow (x+3)\cdot2=56\Big|_{:2} \Rightarrow x+3=28\Big|_{-3} \Rightarrow x=25$