Question

Resolver con metodo de igualacion:

5x+4y=10
X-y=7

3x-5y/2 -7=2
3x/6 +5y=3

Answer 1

• 5x + 4y = 10

• x - y = 7

x - y = 7

y = -x + 7

5x + 4y = 10

5x + 4 (-x + 7) = 10

5x - 4x - 28 = 10

x = 10 + 28

x = 38

y = -x + 7

y = -(38) + 7

y = -31

• 3x - 5/2y -7 = 2
• 3/6x + 5y = 3

3x -5/2y -7 = 2

-5/2y = -3x + 2 + 7

-5/2y = -3x + 9

y = 6/5x - 18/5

3/6x + 5y = 3

1/2x + 5 (6/5x - 18/5) = 3

1/2x + 6x - 18 = 3

13/2x = 3 + 18

13/2x = 21

x = 21 : (13/2)

x = 42/13

3/6x + 5y = 3

1/2 (42/13) + 5y = 3

21/13 + 5y = 3

5y = 3 - 21/13

5y = 18/13

y = 18/13 : 5

y = 18/65

Answer 2

Respuesta:

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