Explicación paso a paso:
x - 9 = 21
x = 21 + 9
x = 30
Comprobación:
x - 9
30 - 9 = 21
Suma 9 en ambos lados
[tex]x = 21 + 9[/tex]
Simplifica 21 + 9 a 30
[tex]x = 30[/tex]
[tex]x - 9 = 21[/tex]
Has que x = 30
[tex]30 - 9 = 21[/tex]
Simplifica 30 - 9 a 21
[tex]21 = 21[/tex]
Saludos cordiales
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Explicación paso a paso:
x - 9 = 21
x = 21 + 9
x = 30
Comprobación:
x - 9
30 - 9 = 21
Verified answer
Suma 9 en ambos lados
[tex]x = 21 + 9[/tex]
Simplifica 21 + 9 a 30
[tex]x = 30[/tex]
[tex] \pink{comprobar \: respuesta}[/tex]
[tex]x - 9 = 21[/tex]
Has que x = 30
[tex]30 - 9 = 21[/tex]
Simplifica 30 - 9 a 21
[tex]21 = 21[/tex]
Saludos cordiales