Question

if x+y=-10 and x-y=2, what is the value of x?

Answer 1

In order to solve this system for x, we can add both equations:

$\begin{gathered} x+y+(x-y)=-10+2 \\ 2x=-8 \\ x=-\frac{8}{2} \\ x=-4 \end{gathered}$

So the value of x is -4.