Thursday, 20 February 2014

Algebra... Different "Faces" of Algebra (I)

The total length of 4 roads is (3x - 1) km.
What are the possible lengths of the 4 roads in kilometres?

e.g. The length of the 4 roads are: x km, x km, x-7 km, 6 km
Check: x + x + (x - 7) + 6 = 3x - 1

Enter your suggested lengths in comments.

2 comments:

  1. (12x - 4) km

    Check: (3x) x4
    =12x
    Check: 1x4
    =4

    ReplyDelete
  2. Minimum is x=8

    8 x 3 - 1 = 23
    8 + 8 + ( 8 - 7 ) + 6 = 23

    ReplyDelete