Respuesta :

Answer:

[tex]21(2-x)+12x=44[/tex]

[tex]42-21x+12x=44[/tex]

[tex]42-9x=44[/tex]

[tex]42-9x-42=44-42[/tex]

[tex]-9x=2[/tex]

[tex]-9x=2\\-9 ~~-9[/tex]

[tex]x=-2/9[/tex]

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