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

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