Răspuns :
a+b+c=925
2a=b
c=15+b
c=15+2a
a+2a+2a+15=925
5a=910
a=182
b=182*2=364
c=364+15=379
2a=b
c=15+b
c=15+2a
a+2a+2a+15=925
5a=910
a=182
b=182*2=364
c=364+15=379
a+b+c=925
b=2a=>a=b:2
b=c-15=>c=b+15
b+2b+2b+30=1850
5b=1850-30
b=1820:5=364
a=364:2=182
c=364+15=379
b=2a=>a=b:2
b=c-15=>c=b+15
b+2b+2b+30=1850
5b=1850-30
b=1820:5=364
a=364:2=182
c=364+15=379