Martha is solving the equation shown Which operation did Martha do on both sides of the equation in Step 2 to obtain the
equation in Step 3?
Step 1: 4x - 16 + x = 81
Step 2:
5x - 16 = 81
Step 3:
5x = 97

HELP PLZ NEED ANSWERS RN !

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°