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Question Number 189367 by 073 last updated on 15/Mar/23

Answered by HeferH last updated on 15/Mar/23

$$◻\left({(\mathrm{a}+1)}^2\right)=\mathrm{a}$$$$△\left(\mathrm{a}\right)=\frac{3\mathrm{a}}{2}$$$$\oplus \left(\frac{3\mathrm{a}}{2}\right)=\mathrm{a}+7$$$$\bullet △\left(18\right)=\frac{3\cdot 18}{2}=27$$$$\bullet \oplus \left(27\right)=18+7=25$$$$\bullet ◻\left({(\mathrm{a}+1)}^2\right)=\mathrm{a}$$$${(\mathrm{a}+1)}^2=25$$$$\mathrm{a}=4$$$$\bullet ◻\left({(4+1)}^2\right)=4$$$$\therefore ◻(\oplus (△\left(18\right)))=4$$

Commented by 073 last updated on 15/Mar/23

$$\mathrm{nice}\mathrm{solution}$$

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