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4n + 12 = 60
4n = 48 /:4
n = 12
Odp. Te liczby to 12, 14, 16 i 18.
x = 12
Są to liczby 12, 14, 16 i 18
60=x+x+2+x+4+x+6
60=4x+12
4x=60-12
4x=48
x=12
x+2=14
x+4=16
x+6=18
Odp: są to liczby 12,14,16 i 18