Surely, in these mathematical cases, the '=' is not assigning anything, it is rather signifying that (y) and (x*2) are equal. So IF x=10 THEN y=20. Best, Mark On 12 Jul 2006, at 22:38, Viktoras Didziulis wrote: > Solve: y=x*2 > Given: x=10 > --------------- > Answer: y=20