1. [tex] \frac{7+10+x}{3}= 9[/tex] => [tex] \frac{17+x}{3} = \frac{9}{1} [/tex] =>17+x=9*3 => 17+x=27 => x=27-17 => x=10
proba: [tex] \frac{7+10+10}{3} [/tex] = 9
2. Cred ca voiai sa zici 3 numere :)) Ma rog...
[tex] \frac{41+126+x}{3} = \frac{77}{1}[/tex] =>167+x = 77*3 => 167+x=231 =>x=231-167=>x=64
proba: [tex] \frac{41+126+64}{3} [/tex] = 77
3.[tex] \frac{a+b+c}{3} = \frac{14}{1} =\ \textgreater \ a+b+c = 14*3 =\ \textgreater \ a+b+c =42[/tex]
d=22
[tex] \frac{a+b+c+d}{4} = ?
=\ \textgreater \ \frac{42+22}{4} = \frac{64}{4} =16[/tex]
