The second, 4th and 6th ones are the correct answers.
-2(3z+8)=1/3(9-18z)
-6z-16=1/3(9-18z)
-6z-16=1/3(-18z+9)
-6z-16=1(-18z+9)
———-
3
0=57
The input has no solution
2x + 4x = 180
6x = 180
x = 30
In this problem if line p is parallel to line q then consecutive interior angles are supplementary.
Hope this helps :-)