Question

Se dau 3 nr abc despre care stim: a::b=2. c:b=3,rest 3 a+b+c=57. aflati nr

Answer 1

a,b,c cele trei numere
a+b+c=57
a:b=2
a=2b
c:b=3 rest 3
c=3b+3
înlocuind in suma
2b+b+3b+3=57
6b=54
b=54:6
b=9
a=2×9
a=18
c=3×9+3
c=30
P:18+9+30=57

Answer 2

a+b+c=57
a:2=b...=>a=2*b...=>a=2b
c:b=3 r 3...=> c=3*b+3...=> c=3b+3

2b+b+3b+3=57
6b+3=57
6b=57-3
6b=54
b=54:6
b=9
a=9*2
a=18
c=9*3+3
c=27+3
c=30

9+18+30=
=27+30
=57