Question

решите пж
1462 2)
{9x-2y=-17
{x-2y=7
1463 2)
{9x-7y=95
{4x+y=34

Answer 1

{9x-2y=-17

{x-2y=7

{9х-2у=-17

{х=7+2у

9(7+2у)-2у=-17

63+18у-2у=-17

16у=-17-63

16у=-80

у=-5

{у=-5

{х=7+2у

х=7+2•(-5)

х=7-10

х=-3

{у=-5

{х=-3