# optellen en aftrekken [type: 2/x + 3/x]
questiontype=7
javascript=js/exo1.js
image=0
XSIZE=650
embed=1
mathview=2
cols=20
rows=1
inputs=1
n=$counter
R=$level
!if $level=0
    R=$counter
!endif    
pm=!randitem +,-
mp=!randitem +,-
question$n=!record 7 of lang/remarks.$taal
#@ Reken uit en vereenvoudig zo ver mogelijk<p>
checkfile=exos/checkfile1.proc
var1=1
#1 breuk in antwoord
x=!randitem x,y,a,b,r,s
varlist=$x
exotext=!record 1 of lang/remarks.$taal
!if $R=1
    a=!randitem 1,2,3,4,5,6,7,8,9
    b=!randitem 1,2,3,4,5,6,7,8,9
    !if $a=$b
	b=$[$a+1]
    !endif
    formula$n=\frac{$a}{$x} $pm \frac{$b}{$x} \,\, \rightarrow \,\,
    answer$n=$[$a $pm $b]/$x
    texanswer$n=\frac{$a}{$x} $pm \frac{$b}{$x} = \frac{$a $pm $b}{$x} = \frac{$[$a $pm $b]}{$x}
    var1=$a/$x $pm $b/$x
    sometext=!record 2 of lang/remarks.$taal
    exotext=<p><a onmouseover="return escape('$sometext')">$exotext</a>
 !exit
!endif

!if $R=2
    b=!randitem 2,3,4,5
    a=$[$b+1]
    formula$n=\frac{$a}{$b $x} $pm \frac{1}{$x} \,\, \rightarrow \,\,
    answer$n=$[$a+$b]/($b*$x)
    texanswer$n=\frac{$a}{$b $x} $pm \frac{1}{$x}  =\frac{$a}{$b $x} $pm \frac{$b}{$b $x} \,\,= \,\, \frac{$[$a $pm $b]}{$b $x}
    var1=$a/($b*$x) $pm 1/$x
    sometext=!record 3 of lang/remarks.$taal
    exotext=<p><a onmouseover="return escape('$sometext')">$exotext</a>
 !exit
!endif

!if $R>2
    mp=!randitem -1,1
    b=!randitem 2,3,4,5
    c=!randitem 2,3,4,5,6,7,8,9
    a=$[$mp*($b+1)]
    var1=$a/($b*$x) $pm $c/$x
    tot=!exec pari A=($a $pm $b*$c)/($b*$x)\
    printtex(A)
    answer$n=!line 1 of $tot
    tex=!line 2 of $tot
    formula$n=\frac{$a}{$b $x} $pm \frac{$c}{$x} \rightarrow 
    texanswer$n=\frac{$a}{$b $x} $pm \frac{$c}{$x} = \frac{$a}{$b $x} $pm \frac{$b \times $c}{$b $x} = \frac{$a + $[$b*$c]}{$b $x } = $tex
    sometext=!record 3 of lang/remarks.$taal
    exotext=<p><a onmouseover="return escape('$sometext')">$exotext</a>
 !exit
!endif
