Solve for x: 1/2x - 4 = 8

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Write the percent as a fraction or mixed number in simplest form. 0.8%