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Doss [256]
3 years ago
14

Find m What is the m m

Mathematics
2 answers:
Fiesta28 [93]3 years ago
4 0

Answer:

120

Step-by-step explanation:

ABC is a straight line so it is equal to 180

ABC = ABD + DBC

180 = 2x + x+90

Combine like terms

180 = 3x+90

Subtract 90 from each side

180-90  = 3x+90-90

90 = 3x

Divide each side by 3

90/3 = 3x/3

30 =x

We want to find DBC

DBC = x+90

       = 30+90

        = 120

Alex3 years ago
3 0

Answer:

m<DBC=120°

Step-by-step explanation:

2x+x+90=180

3x=180-90

3x=90

x=30

m<DBC=x+90=30+90=120

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