Respuesta:
-4
Explicación paso a paso:
21+9=×-4+38
30+4-38=×
34-38=×
-4=×
SOLUCION:
[tex]x = - 4[/tex]
[tex]21 + 9 = x - 4 + 38 \\ 30 = x - 4 + 38[/tex]
[tex]30 = x - 4 + 38 \\ 30 = x + 34[/tex]
[tex]30 = \times + 34 \\ 30 - 34 = x + 34 - 34[/tex]
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Respuesta:
-4
Explicación paso a paso:
21+9=×-4+38
30+4-38=×
34-38=×
-4=×
SOLUCION:
[tex]x = - 4[/tex]
Explicación paso a paso:
[tex]21 + 9 = x - 4 + 38 \\ 30 = x - 4 + 38[/tex]
[tex]30 = x - 4 + 38 \\ 30 = x + 34[/tex]
[tex]30 = \times + 34 \\ 30 - 34 = x + 34 - 34[/tex]