Answer:
great
Step-by-step explanation:
The answer to your question is 13.5
So 2x+12=5x-9
you want all of the unknowns on one side and all of the known values on the other or
subtract 2x from both sides
12=3x-9
add 9 to both sides
21=3x
divide both sides by 3
7=x
Answer:
Yes.
Step-by-step explanation:
Yes they are because that is the definition of congruency.