Răspuns :
25/5+ax2=25
5+ax2=25
ax2=25-5
ax2=20
a=20/2
a=10
Acest "/" iseamna impartit
5+ax2=25
ax2=25-5
ax2=20
a=20/2
a=10
Acest "/" iseamna impartit
25:5+ax2=25
5+2a=25
2a=25-5
2a=20
a=20/2
a=10
Verificare: 25:5+10x2=5+20+25
5+2a=25
2a=25-5
2a=20
a=20/2
a=10
Verificare: 25:5+10x2=5+20+25