Question

a+b+c=1600 a= b+c b=200+c. a,b,c

Answer 1

A+b+c=1600
a= b+c
b=200+c
a=200+c+c= 200+2*c
200+2*c+200+c+c=1600
400+4*c=1600
4*c=1600-400
4*c=1200
c=1200/4

c=300

b=200+c
b=200+300=500

a=b+c
a=500+300=800

Answer 2

din a=b+c si b=200+c rezulta ca a=200+c+c
Astfel  ;
 a+b+c= 200+c+c+200+c+c =1600 
 4c+400=1600 
rezulta c =1200:4=300
deci b=300+200=500
si a =b+c=500+300=800
800+500+300=1600