Question

Sa se determine numerele A,B si C ,stiind ca:
a+b=c,cx2=18,b-a=1

Answer 1

a+b=c
2c=18=>c=9 => a+b=9
b-a=1
$\left \{ {{a+b=9} \atop {-a+b=1}} \right. (adunam cele 2 ec ) =\ \textgreater \ 2b=10=\ \textgreater \ b=5$
a=9-5=4
a=4      b=5        c=9