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28 March, 13:02

How to solve - 2 (1-7n) - 5n=34

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Answers (2)
  1. 28 March, 13:09
    0
    -2 (1-7n) - 5n=34

    distributive property

    -2+14n-5n=34

    combine like terms

    -2+9n=34

    +2 + 2

    9n=36

    :9 : 9

    n=4
  2. 28 March, 13:25
    0
    -2 (1-7n) - 5n=34

    Multiply the bracket by - 2

    (-2) (1) = -2

    (-2) (-7n) = 14n

    -2+14n-5n=34

    -2+9n=34

    Move - 2 to the other side. Sign changes from - 2 to + 2.

    -2+2+9n=34+2

    9n=34+2

    9n=36

    Divide by 9 for both sides

    9n/9=36/9

    n=4

    Answer: n=4
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