algebra check please

7(4 - t) = -84
i got:
28 - 7t = -84
-28 = -28
7t = -112
----- -----
7 = 7
t = -16

is this right : -16

asked by marko
  1. Here's your mistake:

    7t = -112

    It should be
    -7t = -112

    t = +16

    posted by Ms. Sue
  2. oh ok i see thanks can you check another:
    -5.5 (8+b) = -33
    i got:
    -44 + -5.5b = -33
    +44 +44
    __________________
    -5.5b = 11
    ___________
    - 5.5 = 5.5
    b = -2

    posted by marko
  3. Right!

    posted by Ms. Sue

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