Maths

A spider has 8 legs, a dragonfly has 6 legs. Given a number of spiders and
dragonflies altogether have 420 legs, number of spiders are 3 times the
number of dragonflies, the number of spiders are?

asked by help needed
  1. 8s+6d=420
    3D= s
    8s+6(s/3)=420
    10s=420
    s= 42

    posted by bobpursley

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