First to answer gets brain thing and there is max points Select the box that correctly identifies the only solution or the best description of how many solutions there are for each equation
= 3
= -3
Infinite Solutions
No Solution
3(x - 7) + 12 = -(12. – 8) - 7
$(126
4(2x + 3) = 53 + 3x - 6
(4x + 6) = -3x + 2(-2 + 12)
2
-5(2x + 6) = -2x + 6 + 4x

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

Idon’t know actually is more difficult