Question

谞转讜谉 讻讬 `1 = 1/a -(a)/(5) +(3b)/(5a) = 1/b-b/3+(7c)/(3b) = (1)/(c) - (c)/(7) + (5a)/(7c)` 诪爪讗讜 讗转 `a^2 + b^2 + c^2`.

Difficulty level (1 very easy - 10 very hard): 3

Topics:
Algebra -> Algebraic Techniques Algebra -> Equations
Sources:
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