Question

2x - 2y = -8 2x + 2y = 4

Answer 1

Let:

`\begin{gathered} 2x-2y=-8_{\text{ }}(1) \\ 2x+2y=4_{\text{ }}(2) \end{gathered}`

Using elimination method:

`\begin{gathered} (1)+(2) \\ 2x+2x-2y+2y=-8+4 \\ 4x=-4 \\ x=(-4)/(4)=-1 \end{gathered}`

Replace the value of x into (2):

`\begin{gathered} 2(-1)+2y=4 \\ -2+2y=4 \\ 2y=4+2 \\ 2y=6 \\ y=(6)/(2) \\ y=3 \end{gathered}`