The answer is 5 and associative property
Answer:
x=4, x=3
B is correct.
Step-by-step explanation:
Given: 
Using middle term splitting factor the left side equation.


Equate each factor to 0 and solve for x
x-4=0 or x-3=0
x=4 and x=3
Hence, The solution of the equation is 4 or 3
3x + x = 1044
4x = 1044 - divide both sides by four
x = 261
coffee table - $261
couch - $783