OnDom Sres. Marlena solved the equation 2x + 5 = -10 - x. Her steps
are shown below
2x + 5 = -10-X
Use the drop-down menus to justify Marlena's work in
each step of the process.
Step 1
Step 2
Step 3
1. 3x + 5 = -10
2 3x = -15
3. x=-5
Done
Intro

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

If your asking how much altogether for 12 performance the answer will be 98,496.