If I was asked to think of a number I multiply it by two I could write this algebraically as two times I think of a number takeaway one and multiply the result by 3X is my unknown

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .