👤

ajutor ..... dau coroane

Ajutor Dau Coroane class=

Răspuns :

X+y=343
X-y=129 
Prin sistem de ecuatii

a+b=343,a-b=129,......a=b+129,inlocuim.....b+129+b=343...2b+129=343...2b=343-129...2b=214....b=214:2....b=107....a+107=343....a=236...