Question

Stiind ca 2a=124,b este de 3 ori mai mare decat c,iar a+b+c=198,dublul sumei dintre b si c

Answer 1

2a=124    a=62
b=3c
a+b+c=198
62+3c+c=198
4c=198-62
4c=136
c=34          b=3x34=102
2x(b+c)=2x(102+34)=2x136=272

Answer 2

2a=124
a=124:2
a=62
a+b+c=198
62+b+c=198
b+c=198-62
b+c=136
b=3c
3c+c=136
4c=136
c=136:4
c=34
b=3x34
b=102
(b+c)x2=(102+34)x2=136x2=
=272