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8 July, 12:36

1 a. s + (-7)

-1

when s = - 3

+3
Answers (1)
  1. 8 July, 15:06
    0
    Use the substitution method

    s + (-7) - 1

    -3 + (-7) - 1

    -negative sign and + positive sign = - negative sign

    -3-7-1

    =-10-1

    =-11

    Answer: - 11
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