An airplane 28,000 feet above ground begins descending at a constant rate of 2,000 feet per minute. which equation gives the height, h, of the airplane after m minutes?

so it's 28000 feet above ground, to start with, then every passing minute "m" is dropping by 2000 feet, let's see,

1 minute28000 - 2000(1)

2 minutes28000 - 2000(2)

3 minutes28000 - 2000(3)

4 minutes28000 - 2000(4)

m minutes28000 - 2000(m)

h = 28000 - 2000m.

the answer to this question is in the pic

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0