Abag contains purple marbles and white marbles, 34 in total. the number of purple marbles is 1 less than 4 times the number of white marbles. how many purple marbles are there?

“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 .

C, e, and a (hope it )