7th grade

-2a - 3(b - 4a)

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asked by Ryan
  1. -2a-3(b-4a) .

    -2b-3b-12a

    10a-3b

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    posted by carl
  2. -2a - 3(b - 4a) =

    -2a - 3b + 12a (minus times minus = positive)

    It is still 10a - 3b, but the middle step of carl had a typo.

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    posted by PsyDAG

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