Select the action you would use to solve 3x = 12. then select the property
that justifies that action.
o
a. action: add 3 to both sides.
o
b. action: multiply both sides by 3.
o
c. action: divide both sides by 3.
o
d. property: addition property of equality
d
e. property: multiplication property of equality
o
f. property: division property of equality

C divide 3 from both sides

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

The answer is the numbers between =5 and 5