Question

(a+b)+(a-b)=160 află numerele

Answer 1

(a+b)+(a-b)=160
a+b+a-b=160
2a=160
a=160:2=80
80+b+80-b=160 => b poate avea orice valoare

Answer 2

[tex](a+b)+(a-b)=160\\ a+b=160-(a-b)\\ a+b=160-a+b\\ 2a=160=\ \textgreater \ a=80\\ 80+b+80-b=160\\ 160+0=160=\ \textgreater \ b=0 [/tex]