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Answer:
x+31=x+20=x is 180(linear pair)
Answered by
1
Step-by-step explanation:
x+31+x+20+x=180 (linear pair)
3x=180-51
x= 129/3
x= 43
Therefore
x=43, x+20= 43+20=63, x+31=43+31=74
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