Question

me ajudem por favor !






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Answer 1

Explicação passo-a-passo:

2x - 8y = 32

x + 3y = 2

2x = 32 + 8y

x = 32 + 8y

2

(32 + 8y) + 3y = 2

2

32 + 8y + 6y = 4

32 + 14y = 4

14y = 4 - 32

14y = -28

y = -2

x = 32 + 8 . (-2)

-2

x = 32 - 16

2

x = 16

2

x = 8

3x - 15y = 18

6x - 10y = 36

3x = 18 + 15y

x = 18 + 15y

3

6(18 + 15y) - 10y = 36

3

6(18 + 15y) - 30y = 108

108 + 90y - 30y = 108

108 + 60y = 108

60y = 108 - 108

60y = 0

y = 0

x = 18 + 15 . 0

3

x = 6

6x + y = 37

x + 3y = 9

6x = 37 - y

x = 37 - y

6

37 - y + 3y = 9

6

37 - y + 18y = 54

37 + 17y = 54

17y = 54 - 37

17y = 17

y = 1

x = 37 - 1

6

x = 6

2x + 4y = 6

x - 2y = 3

2x = 6 - 4y

x = 6 - 4y

2

(6 - 4y) - 2y = 3

2

6 - 8y = 6

- 8y = 6 - 6

- 8y = 0

y = 0

x = 6 - 4 . 0

2

x = 3

x + y = 2

6x + 2y = 10

x = 2 - y

6(2 - y) + 2y = 10

6(2 - 1y) + 2y = 10

12 - 6y + 2y = 10

12 - 4y = 10

- 4y = 10 - 12

- 4y = -2

y = -1/-2

x = 2 - (1/2)

x = 3 /2