Question

a+b+c=100;a=c+b; b=5c a.b.c=?

Answer 1

a+b+c=100
a=c+b
b=5c

6c+5c+c=100 => 12c=100 => c=100/12 => c=25/3
b=5*25/3=125/3
a=25/3+125/3=150/3=50

Answer 2

a+b+c=100
a=c+b
inlocuim in ecuatie
c+b + b + c = 100
2b+2c=100
2(b+c)=100
b+c = 50

b=5c
inlocuim...
5c+c=50
6c=50
#c= 8,3333333.....#

b=5c
b=5*8.3333333...
#b=41.6666666...#

a=c+b
a=8.333333...+41.66666...
#a=50#

Sper că te-am ajutat!!!