Question

Arc AB is congruent to arc CD. What is the length of chord AB? AB= (6m-2) CD=(5m+2)

Answer 1

$6m-2=5m+2\\ m=4\\\\ \overline{AB}=6\cdot4-2=24-2=22$

Answer 2

6m-2=5m+2
6m-5m=2+-(-2)
1m=4
m=4
AB=22