Răspuns :
Răspuns:
Explicație pas cu pas:
1
Masini albastre : |............|
Masini rosii : |............| +8
--------------------------------------------------
Total : |............||............| +8 = 38
|............||............|= 38-8
|............||............|= 30
|............| = 15 masinute
Masini albastre : |............| =15
Masini rosii : |............| +8 = 15+8=23
2.
a= masini albastre
r= masini rosii
a+r= 38
r= a+8
a+(a+8) =38
2a= 30
a=15
r=15+8
r=23