Question

Solve the system withelimination.1-2x + y = 813x + y = -2([?],[?]

Answer 1

`\begin{gathered} 3x+y-(-2x+y)=-2-8 \\ 5x=-10 \\ x=-2 \end{gathered}`

Now we substitute the value of x into the first equation to get the value of y

`\begin{gathered} -2\cdot-2+y=8 \\ 4+y=8 \\ y=8-4=4 \end{gathered}`

Finally the solution is (-2,4)