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5n + 10 = 45
5n = 35
n= 7
Szukane liczby : 7, 8, 9 ,10, 11
2liczba:x+2
3liczba:x+4
4liczba:x+6
5liczba:x+8
razem:45
x+x+2+x+4+x+6+x+8=45
5x+20=45
5x=45-20
5x=25/5
x=5