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  • Utilizator Brainly
2014-03-04T12:45:56+02:00
A+b+c=45
a-3=b-5 ⇒ b=a+2
a-3=c-7 ⇒ c=a+4
a+a+2+a+4=45 ⇒ 3a=39, a=13; b=a+2, b=15; c=a+4, c=17
2014-03-04T13:24:49+02:00
|---|+3nr1
|---|+5 nr2
|---|+7 nr3
45-3-5-7=30    30:3=10 un sg
10+3=13nr1
10+5=15nr2
10+7=17 nr3