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Question-81692




Question Number 81692 by Power last updated on 14/Feb/20
Commented by MJS last updated on 14/Feb/20
just put a=−b−c  ⇒ answer is 9
$$\mathrm{just}\:\mathrm{put}\:{a}=−{b}−{c} \\ $$$$\Rightarrow\:\mathrm{answer}\:\mathrm{is}\:\mathrm{9} \\ $$

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