M<9= 6x and m<11=120. Find the value of x so that line c is parallel to line d.

Answer:
The value of x is 20°
Step-by-step explanation:
we know that
m∠ 9 and m∠ 11 are corresponding angles
If line c is parallel to line d
then
m∠ 9 = m∠ 11
Substitute
6x=120°
x=20°