Question

I need help I'm confused

Answer 1

11. -6
12. -7
In case you didn’t wanna read all that

Answer 2

11) x+61 + x+51 + 80 = 180 ( angle sum property )

2x + 192 = 180

2x = 180 - 192

2x = -12

x = -12/2

x = -6

12) x+52 + 67+x + 75 = 180 ( angle sum property )

2x + 194 = 180

2x = 180 - 194

2x = -14

x = -14/2

x = -7

HOPE IT HELPS !!!