Math
posted by Crystal .
In 1990, the population of Cheyenne, Wyoming, was 73,142. By 2000, the population had increased to 81,607. Write and solve an equation to find, the increase in Cheyenne’s population from 1990 to 2000.
Mercury’s surface temperature has a range of 600 digress. This range is the broadest of any planet in the solar system. Given that the lowest temperature on Mercury’s surface is _ 173 degree. Write and solve an equation to find the highest temperature.

increase = 81607  73142
max = 173 + 600