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Respuesta:
x=-7
y=-3
Explicación paso a paso:
Pasos:
[ x = 8 + 5y ; - 7x + 8y = 25 ]
Sustituir x = 8 + 5y
[ - 7 ( 8 + 5y ) + 8y = 25 ]
Simplificar
[ - 56 - 27y = 25 ]
Despejar 'y' para - 56 - 27y = 25
y = - 3
x = 8 + 5y
x = 8 + 5 ( - 3 )
x = 8 - 15
x = - 7
-3
-4
-6
-5