Enter the equation in standard form. y-8=5/7(x-7)

Y - 8 = 5/7 x - 5
5/7 x - y = -8 + 5
5/7 x - y = -3
5x - 7y = -21 
answer
5x - 7y = -21 

“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 .