Question

what ia the value of x in the solution to this system of equationy+2x=-1y=1/2x+4

Answer 1

the system of equation is:

$\begin{gathered} y+2x=-1 \\ y=\frac{1}{2}x+4 \end{gathered}$

If we want to know the value of x we can replace the secon equation into the first equation so:

$(\frac{1}{2}x+4)+2x=-1$

and we solve for x so:

$\begin{gathered} 2.5x=-1-4 \\ 2.5x=-5 \\ x=-\frac{5}{2.5} \\ x=-2 \end{gathered}$