kimberlycano68 kimberlycano68
  • 13-03-2021
  • Mathematics
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jimthompson5910 jimthompson5910
  • 13-03-2021

Answer:  x = 40

Work Shown:

Focus on the angles at the bottom right

Those two angles add to 180 since they form a straight line. We consider them supplementary angles.

x+(4x-20) = 180

5x-20 = 180

5x = 180+20

5x = 200

x = 200/5

x = 40

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