Answer:
3
Step-by-step explanation:
3km
If they are walking 3km for every hour that they walk, then in 1 hour they will walk 3km.
4x+8x+12x+16x=5+10+30+40
4x+8x+12x+16x= 85
40x=85
x= 85/40
x=2.125
Santiago Chile (AP)
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217x+99=25 217x=25-99 217x= -74 X=-74/217
the first on is -42
the second one is -80
the last on is -88