tania66
tania66 tania66
  • 19-09-2018
  • Mathematics
contestada

If 8x -2=-9+7x,what is the value of 4x-4?

Respuesta :

miniLevi
miniLevi miniLevi
  • 19-09-2018

8x - 2 = -9 + 7x

Add 2 to both sides to eliminate it: 8x = -7 + 7x

Subtract 7x from both side to eliminate it. x = -7

Since x = -7, we can substitute x in 4x - 4 for -7.

Like this: 4(-7) - 4

Now simplify and solve:

-28 - 4

-32

The value of 4x - 4 is 32, since x = -7


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