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The coefficient is the number before the x
In this case, it is 3
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Add the two angles and then subtract from 180* to find the missing angle
So,
145* + 15* = 160*
180* - 160* = 20*
Answer: x = 20*
1.= 6,391
2.=6,3910
3. = 6,39100
All you do is add the 0s at the end
I think it would be 10,000
correct me if i am wrong