What is the property to be used in each equation to solve for x? APE, SPE, MPE or DPE? (Property of Equality) x+47=28

20=x-11

3.9x=27.3

5/7=-5/7 x

-x=27
32-x=27

2x minus y equals 6, x plus y equals negative 3

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )