Question

a+b+c=582
a+b=134
b+c=236
Afla cele trei numere?

Answer 1

a+b+c=582
a+b=134 => a=134-b
b+c=236 => b=236-c

a+b+c=582
(134-b)+(236-c)+c=582
134-b+236-c+c=582
134-b+236=582
-b=582-134-236
-b=212 |: (-1)
b=-212
a+b+c=582
a+(-212)+c=582
a-212+c=582
a+c=582+212
a+c=794
(134-b)+c=794
134-b+c=794
134-(-212)+c=794
134+212+c=794
346+c=794
c=794-346
c=448
a+b+c=582
a+(-212)+448=582
a-212+448=582
a=582+212-448
a=346

Coroana?