Question

resolver por metodo de reduccion 5x+y=11
-x-7y=-9​

Answer 1

Respuesta:

5x+y=11

-x-7y=-9​

35x + 7y = 77

  -x  - 7y = -9

34x = 68

x = 68/34

x = 2

reemplazas en "x"

35x + 7y = 77

35(2) + 7y = 77

70 + 7y = 77

7y = 77 - 70

7y = 7

y = 7/7

y = 1

comprobación

35x + 7y = 77

35(2) + 7(1) = 77

70 + 7 = 77

77 = 77

-x - 7y = -9

-2 - 7(1) = -9

-2 - 7 = -9

-9 = -9

Explicación paso a paso: