Răspuns:
Explicație pas cu pas:
a,b,c= cele 3 numere
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a/2+4=x
a/2=²⁾(x-4)
a= 2x-8
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b/2+8=x+1
b/2=x+1-8
b/2=²⁾ (x-7)
b=2x-14
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c/2+12=x+2
c/2=x+2-12
c/2=²⁾(x-10)
c= 2x-20
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l---------l---------l - 8 (a)}
l---------l---------l -14 (b) } 60 suma
l---------l---------l -20 (c) }
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2 seg +2 seg+2 seg= 6 segmente egale
60+8+14+20 = 102 ( suma celor 6 segmente egale)
102:2= 17 (un segment )
17*2-8= 26 (a)
17*2-14=20 (b)
17*2-20 =14 (c)
a= 26
b=20
c=14
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Verificare :
26+20+14=60
26:2+4=17
20:2+8=18
14:2+12=19
17,18,19 = numere consecutive
