a triangle ABC,D ∈ AC, m< A = 4x°, m< C = 3x°, m< CBD = 5x°,
and AB = CD. Find x°
Not quite sure what construction you have here, presuming the ABC label vertexes and D is a point on the line AC, what do you mean by m< A = 4x°, m< C = 3x? is x a length (in which case A=4x doesn't seem to make sense) or is m a length equal to 4x in which case what is m<A supposed to mean?