In which proportion does x have a value of 4?*
O x/21 = 12/7
O
12/21 = x/7
O
5/2 = 1/x
O
1/x = 5/200

“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 .

8-2x+3x2=6 and six is your answer