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y - wiek taty
z - wiek syna
x+y+z=93
z=x/3
x=y-2
x+y+z=93
z=x/3
y=x+2
x+x+2+x/3=93 |*3
3x+3x+6+x=279
7x=279-6
7x=273
x=39
39=y-2
y=39+2
y=41
z=39/3
z=13
wiek mamy- x-2
wiek syna - (x-2):3
x+x-2+1/3x-2/3=93
2 i 1/3 x = 93+2+2/3
2 i 1/3 x = 95 i 2/3
x= 41
wiek taty- 41 lat
wiek mamy - 39 lat
wiek syna - 13 lat