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20 August, 06:30

1 a. s + (-7)

-1

when s = - 3

+4
Answers (1)
  1. 20 August, 06:58
    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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