06-09-2018
Mathematics

contestada

x - 13 = 5x + 7
a) -5
b) 3
c) 6
d) 2

Respuesta :

07-09-2018

[tex]x-13=5x+7\ \ \ \ |+13\\\\x=5x+20\ \ \ \ |-5x\\\\-4x=20\ \ \ \ |:(-4)\\\\x=-5\\\\Answer:\ a)\ -5[/tex]

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