Answer:
x=13
Step-by-step explanation:
For a to be parallel to b, 7x-26 + 9x-2 would have to = 180.
If we solve this equation,
16x-28=180
16x=208
x would have to equal 13 for a || b.
7x-26+9x-2=180
208/16=x
13=x
