3619.11 or <span>2412.74 ...............</span>
Answer:
B=9 (I'll solve right now, just so you get the answer)
Step-by-step explanation:

Expand right side by distributing

Use the FOIL method to simplify (first, outside, inside, last):


Simplify

Re-insert

Cancel out 

Move all terms to one side

Simplify

Factor out the common term 2

The possible values of x could be -5 and -1 ithink idk
Answer:
3 beause when you dividend it -5.6+4(3) .