Question

Consider the following equations: −x − y = 1

y = x + 3 If the two equations are graphed, at what point do the lines representing the two equations intersect?
( -1, 2)
( -2 , 1)
( 1 , -2)
( 2, -1)

Answer 1

solve for X and y using both equations the point you get will be the point they cross eachother
-x-y=1
y=x+3
-x-(x+3)=1
-x-x-3=1
-2x-3=1
+3 both sides
-2x=4
÷-2 both sides
x=-2
solve for y
y=-2+3
y=1
(-2,1)