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solniwko [45]
3 years ago
13

Angle abc and dcb make a linear pair. of abc=2x+9 and dbc=10x+15,find x

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
8 0

Answer:

x = 13

Step-by-step explanation:

A linear pair of angles sum to 180° , then

2x + 9 + 10x + 15 = 180 , that is

12x + 24 = 180 ( subtract 24 from both sides )

12x = 156 ( divide both sides by 12 )

x = 13

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