How tall is a poplar by the river if we know that 1/5 of its total height is a trunk, 1/10th of the height is the root, and 35m from the trunk to the top of the poplar?

Correct answer:

x =  50 m

Step-by-step explanation:

35+5x+10x=x  35+x/5+x/10=x  7x=350  x=7350=50  x=50=50 m

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