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19 July, 11:54

Find RT if RS=x+9, ST=1, and RT=2x

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Answers (2)
  1. 19 July, 12:10
    0
    16 units.

    Step-by-step explanation:

    We have that RS = x + 9

    RT = 2x and ST = 1

    RT + ST = RS

    2x + 1 = x + 9

    2x - x = 9 - 1, x = 8

    So RT = 2x = 2 (8) = 16
  2. 19 July, 12:15
    0
    2x = x + 9 + 1

    (Subtract x on both sides)

    x = 9 + 1

    (Combined like terms)

    x = 10
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