👤

a+b+c=?
a+b=324
b+c=364
a+c=312


Răspuns :

a+b=324
b+c=364
a+c=312
-------------------------
a+b+b+c+a+c=324+364+312
2a+2b+2c=1000
a+b+c=1000:2
a+b+c=500
-------------------------
Vezi imaginea ANDREEAPBA