Răspunsuri

2014-10-18T11:35:27+03:00
X-primul nr
4x+1-al doilea nr

x+4x+1=21
5x=21-1
5x=20
x=20:5
x=4(primul nr)
4x4+1=17(al doilea nr)

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  • Utilizator Brainly
2014-10-18T11:35:54+03:00