abrooke140239 abrooke140239
  • 14-01-2021
  • Mathematics
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Help I'll make you a Brainlest

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devishri1977
devishri1977 devishri1977
  • 14-01-2021

Answer:

x = 13

Step-by-step explanation:

m∠ABC + m∠CBD = 180°       {linear pair}

3x + 43 + 6x +  20 = 180

3x + 6x + 43 + 20 = 180

    9x  + 63           = 180

                     9x = 180 - 63

                    9x = 117

                     x = 117/9

x = 13

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