Graph and find solution set for

Y=2x-4

Y=-2x+4

You need to solve for each value x and y. These two equations provide the intersection of both whereby

y=2x-4 and y=x-1

this gives us, by replacing y in the first equation with x-1 = 2x-4

subtract the left side x from the right side gives us - 1 = x - 4

subtracting known values x = 3

verfy the results gives us 2 (3) - 4 = y

2 = y

also 3 - 1 = y

2 = y

so you wind up with x = 3 and y = 2