Respuesta:
[tex]x + 3 + 2x = 15 \\ x + 2x = 15 - 3 \\ 3x = 12 \\ x = 4[/tex]
[tex]x + 5 + 5 + x - 3 = 15 \\ x + x = 15 - 5 - 5 + 3 \\ 2x = 8 \\ x = 4[/tex]
[tex]x - 2 + x + 3 + x + 2 = 15 \\ x + x + x = 15 + 2 - 3 - 2 \\ 3x = 12 \\ x = 4[/tex]
Comprobadas las tres horizontales, obtenemos que x siempre será 4
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Respuesta:
[tex]x + 3 + 2x = 15 \\ x + 2x = 15 - 3 \\ 3x = 12 \\ x = 4[/tex]
[tex]x + 5 + 5 + x - 3 = 15 \\ x + x = 15 - 5 - 5 + 3 \\ 2x = 8 \\ x = 4[/tex]
[tex]x - 2 + x + 3 + x + 2 = 15 \\ x + x + x = 15 + 2 - 3 - 2 \\ 3x = 12 \\ x = 4[/tex]
Comprobadas las tres horizontales, obtenemos que x siempre será 4