5x + 2y = - 7
x - y = 0
x = 0 + y
x = y
5 (y) + 2y = - 7
5y + 2y = - 7
7y = - 7
y = - 7 / 7
(y = - 1) VALOR DE Y
REEMPLAZAMOS Y PARA CONSEGUIR EL VALOR SE X
5x + 2 (-1) = - 7
5x - 2 = - 7
5x = - 7 + 2
5x = - 5
x = - 5 / 5
(x = - 1)
COMPROBAMOS!
5 (-1) + 2 (-1) = - 7
- 5 - 2 = - 7
- 7 = - 7
(-1) - (-1) = 0
- 1 + 1 = 0
0 = 0
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Verified answer
5x + 2y = - 7
x - y = 0
x = 0 + y
x = y
5 (y) + 2y = - 7
5y + 2y = - 7
7y = - 7
y = - 7 / 7
(y = - 1) VALOR DE Y
REEMPLAZAMOS Y PARA CONSEGUIR EL VALOR SE X
5x + 2 (-1) = - 7
5x - 2 = - 7
5x = - 7 + 2
5x = - 5
x = - 5 / 5
(x = - 1)
COMPROBAMOS!
5 (-1) + 2 (-1) = - 7
- 5 - 2 = - 7
- 7 = - 7
(-1) - (-1) = 0
- 1 + 1 = 0
0 = 0