A) By Graphing:
x = y + 4,
When x = 0, y = -4
when y = 0, x = 4
Coordinates would be: (0, -4) & (4, 0)
B) Just substitute the value of x from equation 1 into equation 2,
y = -2x - 4
y = -2(y + 4) - 4
y = -2y - 8 - 4
y + 2y = -12
y = -12/3
y = -4
Now, substitute it into first equation,
x = y + 4
x = -4 + 4
x = 0
In short, Your Answers would be: x = 0 & y = -4
Hope this helps!
