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A 20kg child and a 30kg child sit at opposite ends of a 4 m seesaw that is pivoted at the center where shed another 20 kg child sit in order to balance the seesaw?
Wiki User
∙ 11y ago
20*4-30*4+20x=0
80-120=-20x
-40=-20x
2=x
Wiki User
∙ 11y ago
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