Odpowiedź:
1.
x+3x=32
4x=32 I:4
x=8
Darek= 8l
Marek= 8*3= 24
2.
160km-4h
80km-2h
40km-1h (czyli 40km/h)
3.
90km- 1h
3km-30min
1=10min
0,2=2min
90+0,2+1=91,2km
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Odpowiedź:
1.
x+3x=32
4x=32 I:4
x=8
Darek= 8l
Marek= 8*3= 24
2.
160km-4h
80km-2h
40km-1h (czyli 40km/h)
3.
90km- 1h
3km-30min
1=10min
0,2=2min
90+0,2+1=91,2km