What is the first step when solving the system of equations by elimination? 2x + 3y = 12
4x – 3y = 12

A)Add the two equations together so that the x's will cancel.
B)Add the two equations together so that the y's will cancel.
C)Subtract the two equations together so that the y's will cancel.
D)Subtract the two equations together so that the x will cancel

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

Bis your answer rot d