Question

va rog frumos repede dau coronita​

Answer 1

Răspuns:

x-2y=5

y+3z=7

3z+3y+x=12

1z+1y=12-x

1z+1y=12-7

1z+1y=5

x=12-5

x=7

7-2y=5

y=1

1+3z=7

z=2

x+6z=7+12=19.