Respuesta:
X = -10 & Y = 19
Explicación paso a paso:
En:
3x + 2y = 8
3x + 2(9-x) = 8
3x + 18 - 2x = 8
3x - 2x = 8 - 18
x = -10
&
x + y = 9
-10 + y = 9
y = 9 + 10
y = 19
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Respuesta:
X = -10 & Y = 19
Explicación paso a paso:
En:
3x + 2y = 8
3x + 2(9-x) = 8
3x + 18 - 2x = 8
3x - 2x = 8 - 18
x = -10
&
En:
x + y = 9
-10 + y = 9
y = 9 + 10
y = 19