Question

a+b+c=23, a=b-4 , b=c+1 aflati a, b ,c

Answer 1

a=b-4
b=c+1
deci a=c+1-4=c-3
a+b+c=23
inlocuim pe a si pe b in functie de c
c-3+c+1+c=23
3c=25
c=25/3
a=c-3=25/3-3=(25-9)/3=16/3
b=25/3+1=(25+3)/3=28/3


verificare 16/3+28/3+25/3=(16+28+25)/3=69/3=23