Answer:
x = 26
Explanation:
If angle a and b are congruent, then set 68 and 4x + 8 together to equal to 180 on the right side. Combine 68 and 8 together to get 76. Then, subtract 76 on both sides to get 104 on the right side. Divide that number by 4 to get your x-value which is 26.