Lines AB and CD intersect at a point O in such a way that the measure of angle AOC is 3 times the measure of angle COB. What is the measure of angle AOC?

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

sorry not knowing about that

10+4√2 is the answer. i dont have the time to explain.