X should equal -6/11 if I read the equation right
Answer:

Step-by-step explanation:

express b^-4 with a positive exponent using:



That means 2*3* the sum of 5+8 which gives you 78 as your answer. Hope this helps and please select as the brainliest answer.
Its already fully simplified.
It is true since you’re multiplying the same number on both the sides