Minta tolong jawabkan soal no 27 beserta caranya

[tex]x + 60 + x = 180 \\ 2x = 180 - 60 \\ x = 120 \div 2 \\ x = 60[/tex]
[tex] = 4(60) - 10 \\ = 240 - 10 \\ = 230 - 180 \\ = 50[/tex]