Răspuns :
a+b+c=90
b=3a
c=2b
c=2*3a
c=6a
inlocuim
a+3a+6a=90
10a=90
a=9
b=3*9
b=27
c=27*2
c=54
a __/
b __/__/__/
c __/__/__/__/__/__/
90 : 10 = 9
a = 9
b = 27
c = 54
b=3a
c=2b
c=2*3a
c=6a
inlocuim
a+3a+6a=90
10a=90
a=9
b=3*9
b=27
c=27*2
c=54
a __/
b __/__/__/
c __/__/__/__/__/__/
90 : 10 = 9
a = 9
b = 27
c = 54