3.8x + y =-16- 3x + y =-5

asked Aug 25, 2023 193k views

4 votes

4.0k points

Please log in or register to add a comment.

1 vote

let:

$\begin{gathered} 8x+y=-16_{\text{ }}(1) \\ -3x+y=-5_{\text{ }}(2) \end{gathered}$

Using elimination method:

$\begin{gathered} (1)-(2) \\ 8x-(-3x)+y-y=-16-(-5) \\ 11x=-11 \\ x=-(11)/(11) \\ x=-1 \end{gathered}$

Replace the value of x into (1):

$\begin{gathered} 8(-1)+y=-16 \\ -8+y=-16 \\ y=-16+8 \\ y=-8 \end{gathered}$

4.7k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.6m questions

6.0m answers