Line a is parallel to b, m< 6=85, and m< 3=2x. find m< 1

Angle 3 and 6 are consecutive interior angles so their sum is equal to 180

since 1 and 3 are vertical angles they have the same measure. The goal is to find angle 3 to find angle 1.
 
We take our equation add solve it.

Now we know x so we can plug that back into 2x to figure out the value of angle 3. 2(47.5) = 95 That is the measure of angle 3. Since 1 and 3 are vertical angles they have the same measure. 1=95