Subsitute

y=4x-1

y=-3x-8

x = - 1

y = - 5

Step-by-step explanation:

Because we have an equation for the value of y, we can do this:

4x - 1 = - 3x - 8

Then we can solve for x.

4x = - 3x - 7 - - - add 1 to both sides

7x = - 7 - - - add 3x to both sides

x = - 1 - - - divide both sides by 7.

Now that we know the value of x, we can solve for y.

y = 4 (-1) - 1 - - - plug in x

y = - 4 - 1 - - - simplify

y = - 5 - - - simplify

Now we know x and y.

x = - 1

y = - 5