Chapter 5: Algebra... Different "Faces" of Algebra (II)

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

58 comments:

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    1. 1 road - x
      2 road - x
      3 road - x
      4 road - -1x

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    1. The Lengths of the 4 roads
      1 ~ x
      2 ~ x
      3 ~ x-8
      4 ~ 7

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  4. Replies
    1. 1st - x
      2nd- x
      3rd- (x+6)
      4th- -7

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    2. road 4 -> -7???
      cannot be negative

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    3. A ROAD CAN NEVER BE -7!!! NO LOGIC. :D

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    4. How You Created a -7 Road?

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    5. It is not possible to have a road that is -7 in length.

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  8. The length of the 4 roads are: (1/2)x km, x km, (x-1) km, (1/2)x km
    Check: (1/2)x km + (1/2)x km + x km + (x-1)km
    =(3x-1)km

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  9. Road 1 - 1.2x km
    Road 2 - 0.7x km
    Road 3 - 1.1x km
    Road 4 - 1 km

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    1. 1.2x km + 0.7x km + 1.1x km + 1km

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    2. Your current total is (3x+1)km not (3x-1)km

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    3. this does not add up to (3x-1)
      pootis!

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    4. There is no negative number (-1).

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    5. Road 1 - 1.5x km
      Road 2 - 1.5x km
      Road 3 - -1 km
      Road 4 - 2 km

      1.5x km + 1.5x km + -1km + 2km

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    6. Ryan shut up u the pootis.

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    7. so mean......
      by the way..... what is "shut up u the pootis?"

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  10. Replies
    1. road 1= x
      road 2= x
      road 3= (x+19)
      road 4= -20

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  11. The length of the 4 roads are: x km, x km ,x-9km, 8km
    x+x+(x-9)+8=3x-1

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    2. the length of the roads are..........
      x,x,(x+2) and x-1
      check x+X+(x+2)+(x-1)=(3x-1)
      i think.........
      this is gonna be derped up again

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  18. The length of the 4 roads : 2x , x-8 , 6, 1
    2x+(x-8)+6+1

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  19. The length of the 4 roads are 2x km,x-5 km,2km,2km
    Check:2x+(x-5)+2+2

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  20. tha length of the 4 roads are (x)km,(x)-8km,(x)-8km,15km
    check (x)+[(x)-8]+[(x)-8]+15=[3(x)-1]

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  21. 1st road:x
    2nd road:x
    3rd road:x
    4th road:(5-4)
    x+x+x+(5-4)

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  22. The length of the 4 roads are: 3x Km, x-4 km, x Km, 3 Km
    Check: 3x + (-x-4) + x + 3 = 3x-1
    X = 1

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