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Sagot :
1st angle: 7x+4
2nd: 7x+4-4=7x
3rd: 2(7x+4)
180=7x+4+2(7x+4)+7x
28x+12=180
28x=168
x=6
2nd: 7x+4-4=7x
3rd: 2(7x+4)
180=7x+4+2(7x+4)+7x
28x+12=180
28x=168
x=6
Answer: 7x+4
I am not sure about the second one
2) 4 - 7x+4
3) 2(7x+4)
Step-by-step explanation:
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