Chapter 0.8, Problem 8E

To determine

To solve the equations by graphing.

Answer to Problem 8E

The solution is (-2, 1.25)

Explanation of Solution

Given information: The equations are,

  $3x+4y=-1$ ,

  $-9x-4y=13$

Graph:

Red line represents $3x+4y=-1$

Green line represents $-9x-4y=13$

  

Calculation:

Concluding from the graph.

The two lines intersect at point,

(-2, 1.25)

Hence, the solution is (-2, 1.25)