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Stiind ca: 3orix-5=55 100+2oriy=164 (Z-1)ori7+1=15,aflati numerele x,y si z si apoi calculati(x+y-1):z

Răspuns :

3x-5=55
3x=60
x=20

100+2y=164
2y=64
y=32

(z-1)•7+1=15
7z-7+1=15
7z-6=15
7z=21
z=3

(x+y-1):z=
(20+32-1):3=
(52-1):3=
51:3=
17
[tex]3x-5=55\\ 3x=60\\ x=20\\ 100+2y=164\\ 2y=64\\ y=32\\ 7(z-1)=14\\ z-1=2\\ z=3\\ (x+y-1):z=(20+32-1):3=51:3=17[/tex]