Răspuns :
100×x=100100/÷100
=1001
Verificare:100×1001=100100
248007-z=42315
=248007-42315
=205692
Verificare:248007-205692=42315
=1001
Verificare:100×1001=100100
248007-z=42315
=248007-42315
=205692
Verificare:248007-205692=42315