I need help in geometry! the measure of the supplement of an angle is 30 more than twice the measure of the angle. find the measure of the angle

this is how i solved it but it was incorrect

x+2x-30=180
3x-30=180
3x=210
x=70

i got 70 and 110 but i know that’s wrong lol

someone explain?

In the geometric progression –3, 12, −48… what term is 3,072?

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Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*