How do you graph the linear system and estimate the solution? x+y=-7 , 2x+y= -11

Question

Algebra 2 problem.

Answer 1

We have2 equations with 2 unknowns.

x + y = -7

2x + y = -11

Let's subtract the second equation from the first to eliminate the y value

 

-x = 4

x = -4

 

Substituting this back into the first equation to solve for y

-4 + y = -7

y = -3

 

x = -4

y = -3

 

These values check out with the wecond equation also.