Friday

April 18, 2014

April 18, 2014

Posted by **StuartKess** on Saturday, October 15, 2011 at 8:54am.

Ps: how do I do this type of question?

What are the fixed steps?

- Math -
**Jai**, Saturday, October 15, 2011 at 9:16amfirst represent the unknowns using variables:

let 2x = shortest piece

let 7x = 2nd longest piece

let 11x = longest piece

from the second statement, the longest piece is 72 longer than the shortest:

11x = 72 + 2x

solving for x,

11x - 2x = 72

9x = 72

x = 8

the length of the original rope is the sum of all lengths:

2x + 7x + 11x

20x = 20*8 = 160 cm

hope this helps~ :)

- Math -
**StuartKess**, Saturday, October 15, 2011 at 9:48amThanks!!! :) is there any shorter ways? :)))

- Math -
**StuartKess**, Saturday, October 15, 2011 at 9:55amWhy 72 + 2x = 11x ?

Would you be able to list some of the common sentences for forming this type of equations? Thanks!! :)))

**Related Questions**

Math algebra - A 120- foot long rope is cut into three pieces the first piece of...

MATH - The 120-foot rope is cut into 3 pieces.The first of rope is twice as long...

algebra - A 120-foot-long rope is cut into 3 pieces. The first piece of rope is ...

math - a 45 inch rope is cut into 3 pieces. the first piece of rope is 3 inches ...

Meters - Vincent has cut three pieces of rope to complete a science project. Two...

math - A 120-foot long rope is cut into 3 pieces. the first rope is twice as ...

MATH - A 210 ft. long rope is cut into 3 pieces. The first piece of rope is 3 ...

alegebra - a 210 ft. long rope is cut into 3 pieces. the first piece of rope is ...

Math - Henrey had a piece of a rope that was 22 1/2 inches long. Henry cut the ...

Math - Benita has 3 ropes measuring 54 centimeters, 108 centimeters and 189 ...