Respuesta:
a+b+c
b=2a
c=2a
a+b=9
a=3
b=2a→2×3→6
b=6
c=6
3+6+6=15
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Verified answer
Respuesta:
a+b+c
b=2a
c=2a
a+b=9
a=3
b=2a→2×3→6
b=6
c=6
3+6+6=15