Subversion Repositories wimsdev

!set methtit=Add an expression to the two sides of an equation

!set methparmtype=function,parm equation

!set methhelp=This method transforms an equation \(a = b)\

 into the equivalent equation \(a + f = b + f), where \(f) is an algebraic\

 expression.

!if $wims_read_parm iswordof form check

  !goto $wims_read_parm

!endif

!exit

:form

 Add the expression

 !read deduc/methparm.phtml 1,15

 to the two sides of the equation

 !read deduc/methparm.phtml 2

!exit

:check

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

methexp=Add \($methparm1) to two sides of \($left $sign $right)

!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_Always,\

	$ct_Onlywhen the added term is of constant sign,\

	$ct_Onlywhen the added term is positive

!if $askresult>1

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

	$right - ($methparm1)

  !distribute lines $out into badleft, badright

  resultlist=$newobject2,\

	$newleft $newsign $badright,\

	$badleft $newsign $newright

!endif

!exit