Answer:
1
Step-by-step explanation:
26 and 27 26+27=53-27=26 27+26=53-26=27 then 27 -26=1 there one number apart there
I believe all you do is add the numbers with the same coefficients so 2x + 5x + x (in front of x is understood to be a 1) So you get 8x. And 8 + 1 is 9 so the perimeter is B. 8x + 9
