Question

1.2) помогите пожалуйста срочно!!!

Answer 1

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Answer 2

{x+2y+3z=1

{5x+8y-z=7

{2x-3y+2z=9

{x=1-2y-3z

{5-10y-15z+8y-z=7

{2-4y-6z-3y+2z=9

{x=1-2y-3z

{-2y-16z=2 (сокращаем на 2)

{-7y-4z=7

{x=1+2+16z-3z

{y=-1-8z

{7+56z-4z=7

{x=3+13z

{y=-1-8z

{52z=0

{x=3

{y=-1

{z=0