Răspuns :
120/a=0, (15)
120/a=15/99
a= 120/1 :15/99
a=120/1 ×99/15
a=8×99 totul supra /1×1
a=792/1
a=792
Probă
120/792=0, (15) adevarat
120/a=15/99
a= 120/1 :15/99
a=120/1 ×99/15
a=8×99 totul supra /1×1
a=792/1
a=792
Probă
120/792=0, (15) adevarat
[tex] \frac{120}{a} = \frac{15}{99} [/tex]
[tex] \frac{120}{a} = \frac{5}{33} [/tex]
[tex]5a = 120 \times 33[/tex]
5a=3960
[tex]a = \frac{3960}{5} [/tex]
a=792