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Question Number 141972 by iloveisrael last updated on 25/May/21

Commented by Dwaipayan Shikari last updated on 25/May/21

$$x°+20°+(360°-140°)+90°=360°$$$$\Rightarrow x°=30°$$

Commented by I want to learn more last updated on 25/May/21

$$90+\mathrm{x}+20=140$$$$\therefore \mathrm{x}+110=140$$$$\therefore \mathrm{x}=140-110$$$$\therefore \mathrm{x}=30$$

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