Question

PLEASEE HELPP
FIND M A 19
B 22
C 23
D 161

Answer 1

m∠ABC=180°

7x+x-4 = 180
8x = 180+4
8x=184
x=184:8
x=23

∠DBС = x-4 = 23-4 = 19°

Answer: 19°.

Answer 2

C 23

Explanation:From linear pair we can write
`7x+(x-4)=180`

`7x+x-4=180\\8x-4=180\\8x=180+4\\8x=184\\x=(184)/(8) \\x=23`

Hence the value of x in the given figure is 23