ljaida782 ljaida782

25-08-2021
Mathematics

contestada

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

Respuesta :

jimrgrant1 jimrgrant1

25-08-2021

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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