mary has 17 m of rope. She wishes to cut it in three pieces so that she has 3 m more than amanda, and amanda has 2 m less than Sarah.

Question

mary has 17 m of rope. She wishes to cut it in three pieces so that she has 3 m more than amanda, and amanda has 2 m less than Sarah.

in progress 0
Thạch Thảo 6 days 2021-07-22T23:46:24+00:00 1 Answers 1 views 0

Answers ( )

    0
    2021-07-22T23:48:02+00:00

    Answer:

    Length of Sarah rope    = 6 m

    Length of Amanda’s rope  = 4 m

    Length of Mary’s rope  = 7 m

    Step-by-step explanation:

    Let the length of Sarah rope = x

    Length of Amanda’s rope= x – 2

    Length of Mary’s rope = (x – 2 ) + 3 = x – 2 + 3 = x + 1

    Length of rope = 17 m

    x + x – 2 + x + 1 = 17

    Combine like terms

    x + x + x – 2 + 1 = 17

           3x  – 1 = 17

    Add 1 to both sides

    3x = 17 + 1

    3x = 18

    Divide both sides by 3

    x = 18/3

    x = 6

    Length of Sarah rope = x  = 6 m

    Length of Amanda’s rope= x – 2 = 6 – 2 = 4 m

    Length of Mary’s rope =   x + 1 = 6 + 1 = 7 m

Leave an answer

Browse

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