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Exercitiu 8
a+b+c+d=9 992

a+b+c=7 153

a+b=3 586

b=c-1 220

a,b,c,d=?


Răspuns :

a+b+c+d=9992
7153+d=9992
d=9992-7153=2839

3586+c+2839=9992
6425+c=9992
c=9992-6425=3567

b=c-1220
b=3567-1220=2347

a+2347=3586
a=3586-2347=1239

verificare 1239+2347+3567+2839=9992