If y=5x-3 and 3x-y=-1 what is the value of y

If we rewrite the second equation:
3x - y = -1
y = 3x + 1

Then since both equations are equal to y, we can set them as equal to each other and solve for x:
5x - 3 = 3x + 1
2x = 4
x = 2

Now we can plug this x-value into either equation (usually the easier one to solve) and find y:
y = 5(2) - 3
y = 10 + 3
y = 13

So the value of y is 13! :)