Question

a+b+c=? b este de 2 ori mai mic decat a; c=a+b;c-a=30

Answer 1

a=2b =>c=2b+b=3b=> c-a=3b-2b=b=30=>a=30×2=60

c=30×3=90

=>a+b+c=60+30+90=90+90=

=180