Question Number 143102 by liberty last updated on 10/Jun/21
Answered by som(math1967) last updated on 10/Jun/21
$$\mathrm{2}\boldsymbol{{y}}=\mathrm{40}°+\mathrm{2}×\mathrm{48} \\ $$$$\boldsymbol{{y}}=\frac{\mathrm{136}}{\mathrm{2}}=\mathrm{68}° \\ $$$$\boldsymbol{{again}}\:\mathrm{48}\:+\boldsymbol{{x}}=\boldsymbol{{y}} \\ $$$$\boldsymbol{{x}}=\mathrm{68}−\mathrm{48}=\mathrm{20}° \\ $$