Answer:
x is 13
Step-by-step explanation:
x-2=11
then x = 11 +2
since the negative 2 will be crossing over the equal sign to turn positive
x= 13
Answer:
9
Step-by-step explanation:

Hope this helps!
They equal different things. If you simplify the second equation, it is 15x-4 = 15x-12 because of the 3 outside of the paranthesis. Therefore, the equation is wrong.