C because it’s c trust me
KL + LM = KM
(8x - 5) + (6x + 3) = KM
(8x + 6x) + (-5 + 3) = KM
14x - 2 = KM
6000x = 135000; x ≈ 23.
We are required to have one fire extinguisher for every 6000 ft of space in the building; this means we need to find out how many 6000-ft spaces we have in 135000.
Solving this equation, we divide both sides by 6000:
6000x/6000 = 135000/6000 = 22.5 ≈ 23