byxigxzm5u
byxigxzm5u
11-12-2020
Mathematics
contestada
13. Find the value of x.
Respuesta :
avi63
avi63
12-12-2020
Answer:
6x+12+3x-3=180(supplementary angle)
9x+9=180
9(X+1)=180
X+1=20
X=19
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