Răspuns :
(a+b)/2=15
a/b=1/4 a=b/4
(b/4+b)/2=15 (5b/4)/2=15 5b/4=15x2 5b=30x4 b=120/5 b=24
(a+b)/2=15 (a+24)/2=15 a+24=15x2 a=30-24 a=6
proba (6+24)/2=30/2=15 6/24=1/4
a/b=1/4 a=b/4
(b/4+b)/2=15 (5b/4)/2=15 5b/4=15x2 5b=30x4 b=120/5 b=24
(a+b)/2=15 (a+24)/2=15 a+24=15x2 a=30-24 a=6
proba (6+24)/2=30/2=15 6/24=1/4
[tex]\frac{(a+b)}{2}=15 ; a+b=30 \\ \frac{a}b} = \frac{1}{4} ;b=4a \\ a+4a=30 \\ 5a=30 \\ a= \frac{30}{5} \\ a=6[/tex]
b=4a⇒b=4×6=24
a=6
b=24
verificare a+b=30; 24+6=30; 30=30