In order to find the solution to the given system of equations, find x and y intercepts for each line, as follow:
y = -2x + 1
x-intercept:
0 = -2x + 1
2x = 1
x = 1/2
y-intercept:
y = -2(0) + 1
y = 1
Then, the points of intersection for the first line are (1/2 , 0) and (0 , 1)
y = x - 5
x-intercept:
0 = x- 5
x = 5
y-intercept:
y = 0 - 5
y = - 5
Then, the points of intersection of the second line are (5,0) and (0,-5)
Next, graph the two lines by using the previous points:
The solution of the system is the point of intersection between the two lines. As you ca notice, such a point is (2,-3)
Related to your system of coordinates, you have: