Question

61 + 72 + 81 = 2x

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Answer 1

$61 + 72 + 81 = 2x \\ \\ = \geqslant 133 + 81 = 2x \\ \\ = \geqslant 214 = 2x \\ \\ = \geqslant x = \frac{214}{2} \\ \\ = \geqslant x = 107$

Answer 2

$61 + 72 + 81 = 2x \\ \\ 214 = 2x \\ \\ x = 214 \div 2 \\ \\ x = 107 \\ \\ \\ hope \: it \: help$