Respuesta :

20 - 3x + 8 - 4x = 14
28 - 7x = 14
7x = 28 - 14
7x = 14
x = 2

Answer: x = 2

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[tex] \dfrac{1}{2} (-4x + 12)+ 5x = 30[/tex]

[tex]-2x + 6+ 5x = 30[/tex]

[tex]3x = 24[/tex]

[tex]x = 8[/tex]

Answer: x = 8