Question

a+b=345 a+c=575 c-b=230 a=? b=? c=?

Answer 1

a+b=345
a+c=575
c-b=230
-----------------
a=?;b=?;c=?

(a+c)-(c-b)=a+b....=> c=a+b
575-230=345........=>c=345.....si....a+b=345

(a+c)-(a+b)=c-b....=>a=c-b
575-345=230........=>a=230.....si....c-b=230

(a+b)-(c-b)=c-a.....=>b=c-a
345-230=115........=b=115 ......si ....c-a=115

=>a=230
    b=115
    c=345

Verificare

a+b=345
230+115=345

a+c=575
230+345=575

c-b=230
345-115=230