Question

M_ZBC =2x+8, m_ABC=21x-5,
and m ABZ=139° Find m ABC.
to
z
B

Answer 1

163°

Explanation:

Assuming that BZ is a ray inside angle ABC:

2x+8+139=21x-5

8+139+5=21x-2x

152=19x

8=x

m<ABC=21x-5=

21(8)-5=

168-5=

163