Respuesta:
7/4 ó 1,75
Explicación paso a paso:
(3x+y =9)-3
x+3y =13
———————-
-9x-3y = - 27
X + 3y=13
-8x = -14
8x = 14
4x = 7
X = 7/4
x = 1,75
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Respuesta:
7/4 ó 1,75
Explicación paso a paso:
(3x+y =9)-3
x+3y =13
———————-
-9x-3y = - 27
X + 3y=13
———————-
-8x = -14
8x = 14
4x = 7
X = 7/4
x = 1,75