Given, Soledad's computer had 500 GB of hard drive space and there were only 380 GB left after she used it. Let Soledad used x GB of hard drive space in six months. therefore
500 - x = 380
In order to solve this problem, we need to follow certain steps such as:
(a) As the first step, lets try to gather all the variable-related members in one side of the equation. In this case there is only one variable, so no need for this.
500 - x = 380
(b) Now lets eliminate 500 from the left side of equation
-x + 500 - 500 = 380-500 x = 87
Therefore. Soledad used 120 GB of hard drive space in six months.