First one-
9
2nd one-
the second page doesn't have a question
3rd one-
10.5
4th one-
10
Answer:
Pretty sure it's negative 3, cause then X would become -3X. Then when you would add 3X to both sides, it would cancel out both of the -3X then you would be left with 5 = 7, which we all know is not right.
= 
= 14/3