4x 3x -8 angle ADJ is a right angle, so it is equal to 90 degrees. so if you added the two missing numbers together (4x and 3x-8) it would have to equal 90. 4x+3x-8=90 7x-8=90 7x=98 x=14. plug x back into the equations to find your angles. 3(14)-8 and 4(14)