Answer:
x<1/3
Step-by-step explanation:
A. 4.2
(9a+5b-7)+(4b-2)
Add the like terms
9a+9b-9
Same-side interior angles, which are shown here, are supplementary, which means that they add up to 180 degrees.
5a + a = 180
6a = 180
a = 30 degrees
Hope this helps! :)