Question

Find m∠DBC.
What is the m∠DBC?

m∠DBC = ? °

Answer 1

dbc < 120 because 3x+ 90= 180, subtract 90 that leaves 3x = 90 and divide by 3 it’s 30 and if 30 is x than 30+90=120

Answer 2

∠DBC=120

Explanation:

2x+(x+90)=180

2x+x+90=180

3x+90=180

3x=180-90

3x=90

x=90/3

x=30

blug x in to ∠DBC

∠DBC=30+90=120