Subversion Repositories wimsdev

!set methtit2=Multiply an equation by a non-zero number

!set methtit=Multiply an equation by a number

!set methenv=ZZ QQ RR CC

!set methparmtype=number,parm equation

!set methhelp=This method transforms an equation \(A = B)\

 into the equivalent equation \(A*n = B*n), where \(n) is a number,\

 which must be non-zero in order to guarantie the equivalence of the\

 originating equation and the transformed one.

!if $wims_read_parm iswordof form check

 !goto $wims_read_parm

!endif

!exit

:form

 Multiply the equation

 !read deduc/methparm.phtml 2

 by the number

 !read deduc/methparm.phtml 1,10

!exit

:check

 !distribute items $methparmobj2 into data,left,sign,right

 !if $methparm1=0

  error=Multiply an equation by 0 makes you lose information, and is therefore\

   prohibited.

  !advance penalty

  !exit

 !endif

 methexp=Multiply \($left $sign $right) by \($methparm1)

 !read deduc/sub/simplify ($left) * ($methparm1)\

	($right) * ($methparm1)

 !distribute lines $out into newleft,newright

 !if $newleft=$empty or $newright=$empty

  error=bad_data

  !exit

 !endif

 newsign=$sign

 newobject2=$newleft $newsign $newright

 oldobject=2

 contextlist=$ct_Onlywhen the multiplier is non-zero,\

	$ct_Onlywhen the multiplier is positive,\

	$ct_Onlywhen the two sides are positive,\

	$ct_Onlywhen the two sides are of the same sign

!exit