Răspuns :
a+b+c totul supra 3=134.5 => a+b+c=134.5*3=403.5
a=b+22.5
c=2a
Inlocuim:
b+22.5+b+2(b+22.5)=403.5=> 2b+22.5+2b+45=403.5=> 4b+67.5=403.5=>4b= 336 =>b=84
a=84+22.5=106.5
c=2*106.5=213
a=b+22.5
c=2a
Inlocuim:
b+22.5+b+2(b+22.5)=403.5=> 2b+22.5+2b+45=403.5=> 4b+67.5=403.5=>4b= 336 =>b=84
a=84+22.5=106.5
c=2*106.5=213
Fie a ,b si c cele trei numere
[tex]Ma= \frac{a+b+c}{3}=134,5 [/tex]
a=22,5+b=> b=a-22,5
c=2a
Inlocuim in media lor si avem:[tex]a+a-22.5+2a=403.5 \\ 4a=426 \\ a=106.5 \\ c=213 \\ b=106.5-22.5=84[/tex]
[tex]Ma= \frac{a+b+c}{3}=134,5 [/tex]
a=22,5+b=> b=a-22,5
c=2a
Inlocuim in media lor si avem:[tex]a+a-22.5+2a=403.5 \\ 4a=426 \\ a=106.5 \\ c=213 \\ b=106.5-22.5=84[/tex]