First you would figure out what "x" equals. And then you would replace the "x" in your problem to figure out what the answer is.
I'm not completely sure but I think it is -5x.
26,300 = 1/2x + 3200......with x being last years population
I think just divide 4 by 16 and that will be your answer? I'm not sure but the answer that I'm giving you is 4 your welcome if it helped in anyway
Solving for 'y'
2x - 2y + 5 = 0
Add 2y on both sides
2x + 5 = 2y
Divide by 2 on both sides
y = x + 5/2
y = x + 2.5
Solving for 'x'
2x - 2y + 5 = 0
Subtract 2x on both sides.
-2y + 5 = -2x
Divide 2x on both sides
x = y - 5/2
x = y - 2.5