Respuesta :

xXxGirxXx
3x + 8 = 9 + 4x             :First, subtract the 8 over to the right

3x = 1 + 4x                   :Then, subtract the 4x over to the left

-x = 1                           :Then, divide the whole equation by the -1 attached to the                                      x

x = -1
3x+8=9+4x
3x-4x=9-8
-x=1
x=-1

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