Respuesta:
C
Explicación paso a paso:
A] _x - 3 = 9
x= 9+3 x=12
B] _91 + x = 103
x=103-91 x= 12
C] _25 - x = 12
-x= 12-25 x= 13
D] _31 - x = 19
-x= 19-31 x= 12
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Respuesta:
C
Explicación paso a paso:
A] _x - 3 = 9
x= 9+3 x=12
B] _91 + x = 103
x=103-91 x= 12
C] _25 - x = 12
-x= 12-25 x= 13
D] _31 - x = 19
-x= 19-31 x= 12