Hello people in mapleprimes,

I have a question of labels of equations.

For example, suppose that there a following description in a worksheet.

>2*x+y=5;

2*x+y=5 (1)

>3*x+y=6;

3*x+y=6 (2)

>solve({(1),(2)},{x,y});

{x=1,y=3} (3)

subs((3),100+x+100*y)

400

And, when I moved (2) to the next to (1) with dragging and execute those, and clicked !!! on the tool bar, the worksheet

changes as follows, which is wrong.

>2*x+y=5;3*x+y=6;

2*x+y=5

3*x+y=6 (1)

>solve({(1),??},{x,y})

{x = x, y = -3*x+6} (2)

>subs({(1),??},100*x+100*y)

-200*x+600

Do you know some good way with which you aren't bothered with the change of labels of equations which follws the

part of which label you changed by dragging an equation? I will appreciate when you tell me some measures about this.

Best wishes.

taro