Question

Resolva os sistemas de Equações pelo método de CRAMER
(PFV ME AJUDEM!!)

a) 4x-y = 2 b) x+y=1 c) 5x-2y=1
3x+2y=7 x-2y=1 2x+y=4

d) 2x-4y= -2 e) 3x+5y=7 f) x=y-2
5x-3y=2 2x-3y=11 2x+y= -1

g) 3x-2y = 3 h) 7x-3y=6
4y=12 2x=y+3 ​

Answer 1

Explicação passo-a-passo:

4 -1

3 2

8 + 3

D = 11

2 -1

7 2

4 + 7

Dx = 11 x = 1

4 2

3 7

Dy = 22 y = 2

1 1

1 -2

-2 -1

D = -3

1 1

1 -2

-2 -1

Dx = -3 x = 1

1 1

1 1

Dy = 0 y = 0

5 -2

2 1

5 4

D = 9

1 -2

4 1

1 8

Dx = 9 x = 1

5 1

2 4

Dy = 18 y = 2

2 -4

5 -3

-6 20

D = 14

-2 -4

2 -3

6 8

Dx = 14 x = 1

2 -2

5 2

Dy = 14 y = 1

3 5

2 -3

-9 -10

D = -19

7 5

11 -3

-21 -55

Dx = -76 x = 4

3 7

2 11

Dy = 19 y = -1

1 -1

2 1

1 2

D = 3

-2 -1

-1 1

-2 -1

Dx = -3 x = -1

1 -2

2 -1

Dy = 3 y = 1

3 -2

0 4

12 0

D = 12

3 -2

12 4

12 24

Dx = 36 x = 3

3 3

0 12

Dy = 36 y = 3

7 -3

2 -1

-7 6

D = -1

6 -3

3 -1

-6 9

Dx = 3 x = -3

7 6

2 3

Dy = 9 y = -9