Question

ayudaaa
-x-y =8
2x-y =-1

x + y =-7
3x + y =-9

3x -y =8
x+ 2y=5

3x - 4y=16
5x + 6y=14

Answer 1

x+y =-8     ⟵ ( -1 )

2x-y =-1

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3x =-9

x = -9/3

x =-3

( -3 ) + y = -8

y = -8 + 3

y =-5

- x - y =-7

3x + y =-9

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2x = -16

x = -16/2

x = -8

- ( -8 ) - y = -7

8 - y = -7

-y = -7 - 8

-y = -15

y = 15

6x -2y =16     ⟵ ( 2 )

x+ 2y=5

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7x = 21

x = 21/7

x = 3

( 3 ) + 2y = 5

2y = 5 - 3

2y = 2

y = 2/2

y = 1

9x - 12y=48     ⟵ ( 3 )

10x + 12y=28     ⟵ ( 2 )

----------------

19x = 76

x = 76/19

x = 4

5 ( 4 ) + 6y = 14

20 + 6y = 14

6y = 14 - 20

6y = -6

y = -6/6

y = -1

Son muchas, por lo que use el método de reducción