Question

Daca a+b+c=907;a+b=532;b+c=784;atunci afla valorile lui a,b,c

Answer 1

a+b+c=907
a+b=532
532+c=907
c=907-532
c=375
b+c=784
b+375=784
b=784-375
b=409
a+409+375=907
a+784=907
a=907-784
a=123

Answer 2

a+784=907         nu am mai pus b+c si am pus valoarea lor
a=907-784
a=123

532+c=907             am pus valoarea lui a+b
c=907-532
c=375
a+b+c=907
123+b+375=907
123+b=907-375
123+b=532
b=532-123
b=409