Question

(5x - 3y - 19 = 0
7x + 4y = 2

Answer 1

Respuesta:

x= 2 y= -3

Explicación paso a paso:

utilizando metodo de suma y resta

5x - 3y - 19 = 0

7x + 4y = 2

5x - 3y = 19 (4)

7x + 4y = 2 (3)

20x - 12y = 76

21x + 12y = 6

41x = 82

x= 2

5(2) - 3y - 19 = 0

10 - 3y -19 = 0

-3y = 19-10

-3y=9

-y=3 (-1)

y = -3

comprobación:

7(2) + 4(-3) = 2

14 - 12 =2

2=2