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18-09-2015
Mathematics

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8 = 4 - 2x
- 2x +5 = 17
12= - 3 ( x+ 5)

Respuesta :

18-09-2015

[tex]8 = 4 - 2x\\8 + 2x = 4\\2x = -4\\x = -2[/tex]

[tex]- 2x +5 = 17\\-2x =12\\x = -6[/tex]

[tex]12= - 3 ( x+ 5)\\12 = -3x -15\\-3x =27\\x= -9[/tex]

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