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23 June, 10:28

From 4a + 7b - 12c subtract 8a - 9b + 12d.

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Answers (2)
  1. 23 June, 11:50
    0
    -4+16b

    i think thats the answer
  2. 23 June, 12:07
    0
    4a+7b-12c-8a-9b+12d

    Now you have to combine like terms, so a and a, B and B etc.

    4a-8a=-4a

    7b-9b=-2b

    No more like term

    -4a-2b-12c+12d

    Have a nice day
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