Answer:
6
Step-by-step explanation:
To calculate <em>x+10</em>, we first need to find <em>x</em>. To do this, we can use the first equation.
We are given the equation:
To solve for <em>x</em>, turn one side of the equation into 0 and solve. Therefore:
So, the possible values for <em>x</em> are -4 and 12.
However, we are also told that <em>x<0</em>. In other words, <em>x</em> must be negative. Thus, we can remove 12. That leaves us with: <em>x=-4. </em>
So: