I don’t know the answer but I can tell you how to do it subtract starting value minus final value divide that amount by the absolute value of the starting value multiply by 100 to get percent decrease if the percentage is negative it means there was an increase not a decrease
You have to set it up as two problems then combined like terms then add them together
Answer:
-8x3 - 4x2 + 8x - 4
Step-by-step explanation:
Honestly I don't know congruent so congrats I can't answer sorry