Răspuns :
Paii.....
A+B+C=21
A=[----------]
B=[----------][----------]
C=[----------][----------][----------][----------]
21:7=3 (pt ca sunt 7 linii)
A=3
B=3x2=6
C=3x4=12
Sper ca te-am ajutat ! Succes la teme ! Cu drag , GUGULOI ! <33 :DD
A+B+C=21
A=[----------]
B=[----------][----------]
C=[----------][----------][----------][----------]
21:7=3 (pt ca sunt 7 linii)
A=3
B=3x2=6
C=3x4=12
Sper ca te-am ajutat ! Succes la teme ! Cu drag , GUGULOI ! <33 :DD
a+b+c=21
a=b/2
a=c/4⇒c=2b
b/2+b+2b=21⇒b=(21 ori 2)/7⇒b=6
a=b/2
a=6/2
a=3
c=2b
c=2 ori 6
c=12
verificare: a+b+c=21
3+6+12=21
Solutie= a=3 , b=6, c=12
a=b/2
a=c/4⇒c=2b
b/2+b+2b=21⇒b=(21 ori 2)/7⇒b=6
a=b/2
a=6/2
a=3
c=2b
c=2 ori 6
c=12
verificare: a+b+c=21
3+6+12=21
Solutie= a=3 , b=6, c=12