Question

aflati termenii a,b,c,d stiind ca :a+a=b; b+b=c;c+c=d si a+b+c+d=360.Spor la treaba!!!

Answer 1

b=2a;
c=2b⇒c=2·2a⇒c=4a;
d=2c⇒d=2·4a⇒d=8a;
⇒a+b+c+d=360
⇒a+2a+4a+8a=360
⇒15a=360
⇒a=24;
⇒b=2·24=48;
⇒c=4·24=96;
⇒d=8·24=192;

Answer 2

a+a=b=>b=2a
b+b=c=>c=2b
c+c=d=>d=2c
Inlocuim
a+b+c+d=360
a+2a+c+d=360
3a+c+d=360
3a+2b+d=360
3a+2*2a+d=360
3a+4a+d=360
7a+d=360
7a+2c=360
7a+2*2b=360
7a+4b=360
7a+4*2a=360
7a+8a=360
15a=360/:15
a=24=>b=2*24
             b=48=>c=2*48
                          c=96=>d=2*96
                                       d=192