sky2landerme sky2landerme
  • 10-02-2021
  • Mathematics
contestada

Pleas help me and can you explain how you got it.

Pleas help me and can you explain how you got it class=

Respuesta :

kadz345 kadz345
  • 10-02-2021

Answer:

21

Step-by-step explanation:

straight line = 180 degrees ( H,D,R)

180 = 7x - 3 + 2x  - 6    

180 = 7x + 2x - 3 - 6     (group the same type number together)

180 = 9x -9           (simplify the numbers)

189 = 9x    (+9)

21 = x    (divide by 9)

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