43578÷n=631005-630996
43578÷n=9
n=43578÷9
n=4842
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631005-43578÷4842=630996
631005-9=630996
630996=630996
2)p÷6=700380-674752
p÷6=25628
p=25628×6
p=153768
----------------------------------------
674752+153768÷6=700380
674752+25628=700380
700380=700380