Answer:
y = 14
Step-by-step explanation:
[tex]50^\circ+50^\circ+(5y+10)^\circ=180^\circ[/tex]
[tex]100^\circ+(5\times y+10)^\circ=180^\circ[/tex]
[tex](5\times y+10)^\circ=180^\circ - 100^\circ=80^\circ[/tex]
[tex]5 \times y=80^\circ-10^\circ=70^\circ[/tex]
[tex]y=\frac{70^\circ}{5} =14^\circ[/tex]
