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2x- druga liczba
x+2x=51
3x=51 /:3
x=17
Te liczby to 17 i 34
3x = 51/:3
x = 17
2x = 2 x 17
2x = 34
Pierwsza liczba = 17
Druga = 34
x2-druga liczba
x+x2=51
x3=51
51/3=17
17=x
17-jedna liczba
34- druga liczba