Question Number 189864 by normans last updated on 23/Mar/23
Answered by HeferH last updated on 23/Mar/23
Commented by HeferH last updated on 23/Mar/23
$$\mathrm{2x}\:+\:\mathrm{12}°\:=\:\mathrm{180}° \\ $$$$\mathrm{x}\:=\:\frac{\mathrm{168}°}{\mathrm{2}}\:=\:\mathrm{84}° \\ $$
Commented by normans last updated on 23/Mar/23
$$\:{very}\:{good}\:{sir} \\ $$