Solving Linear Equations Question 2 of 10 What is the solution to this equation? 9x - 4(x - 2) = x + 20 A. X=-3
B. X = -7 O
C. x = 7
D. X = 3

9x-4x-8=x+20
5x-x=20+8
4x=28
X=28/4
X=7

This is the graph x=1

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