If C = s − 5 C=s−5 and D = s − 8 , D=s−8, find an expression

Question

If
C
=
s

5
C=s−5 and
D
=
s

8
,
D=s−8, find an expression that equals
C
+
2
D
C+2D in standard form.

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Neala 3 weeks 2021-08-23T22:52:08+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-08-23T22:53:36+00:00

    9514 1404 393

    Answer:

      C +2D = 3s -21

    Step-by-step explanation:

    Use the substitution property of equality.

      C = s -5

      D = s -8

    Then the value of your expression is …

      C +2D = (s -5) +2(s -8)

      = s -5 +2s -16

      C +2D = 3s -21

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )