👤

a+b+c+d=940
a+b=540
d este de 5 ori mai mare decat c
b aste de 2 ori mai mare decat c. Aflati numerele.


Răspuns :

a+b=540
d=5c
b=2c
540+c+5c=940
c=940-540
c=400:6
c=66,6
b=66,6x2=133,3
a=540-133,3=406,6
d=5x66,6=333
a+b+c+d=940  dar a+b=540 si d=5c  atunci
540+c+5c=940
6c=400
c=400/6=200/3
d=5*200/3=1000/3
b=2c  atunci b=2*200/3=400/3
a=540-b=540-400/3
a=540-400/3=(1620-400)/3=1220/3
proba=1220/3+400/3+200/3+1000/3=2820/3=940(adevarat)