Question

17.Aflati doua numere naturale stiind ca suma lor este 13. Discutiei.

21.Determinati numarul natural x, care ferifica urmatoarele egalitati:

a)1453-x=783

b)x-633=2941

c)x-67-92=267

d)542+x-117=638

e)(43+x)+(537-214)=975

                                        

 

 

 

                                                       VA ROG AJUTATIMA URGENT

Answer 1

17. enuntul nu este complet
21. 1453-x=783=>-x=783-1453=>-x=-670=>x=670
 Restu' asa se fac toate :)

Answer 2

$a)\ \ 1453-x=783 \\ x=1453-783 \\ x=670 \\ \\ b)\ \ x-633=2941 \\ x=2941-633 \\ x=2308 \\ \\ c)\ \ x-67-92=267 \\ x-67=267+92 \\ x-67=359 \\ x=426 \\ \\ d) \ \ 542+x-117=638 \\ 542+x=638+117 \\ 542+x=755 \\ x=755-542 \\ x=213 \\ \\ e)\ \ (43+x)+(537-214)=975 \\ (43+x)+323=975 \\ 43+x=975-323 \\ 43+x=652 \\ x=652-43 \\ x=609$