What is the solution to the unique solution below

Question

Line 1: y=-2x-1

Line 2: y= 1/2x-1

Answer 1

y=-1, x=0

they both have the same y intercept = -1 or (0,-1), that's the unique solution

or set the two equations equal

2x-1 = (1/2)x -1

2x = (1/2)x

only x= 0 solves that equation

plug x=0 into either equation to get y=-1