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12 January, 08:14

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

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  1. 12 January, 10:08
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    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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