Răspuns :
c=7a
c-10=5(a+10)
-------------------
7a-10 = 5a + 50
2a = 60
a=30
c=7xa= 7x30 = 210
----------------------------------------
Verificare nu strica niciodata: 210-10 = 200 =5(30+10) = 5x 40 = 200 OK
========================================================
Succes la scoala!
c-10=5(a+10)
-------------------
7a-10 = 5a + 50
2a = 60
a=30
c=7xa= 7x30 = 210
----------------------------------------
Verificare nu strica niciodata: 210-10 = 200 =5(30+10) = 5x 40 = 200 OK
========================================================
Succes la scoala!