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3 January, 16:20

Solve. 1. - 3 (n+1) = 3; 2. 2 (c-12) = 0; 3. 38=-6t-4;

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  1. 3 January, 16:38
    0
    1.-3n-3=3 2.2c-24 = 0 3.42=-6t

    -3n=6 2c=24 42/-6=t

    n=6/-3 c=12 - 7=t

    n=-2
  2. 3 January, 16:42
    0
    1. - 3 (n + 1) = 3.

    -3n + - 3 = 3.

    -3n + - 3 + 3 = 3 + 3.

    -3n = 6.

    -3n/-3 = 6/-3.

    n = - 2.

    2. 2 (c - 12) = 0.

    2c - 24 = 0.

    2c - 24 + 24 = 0 + 24.

    2c = 24.

    2c/2 = 24/2.

    c = 12.

    3. 38 = - 6t - 4.

    38 + 4 = - 6t - 4 + 4.

    42 = - 6t.

    42/-6 = - 6t/-6.

    -7 = t.
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