-z-2t+2=4 z=-7-t

To solve this system of equations, we can substitute the value of z from the second equation into the first equation.

Substituting z = -7 - t into the first equation:

(-7 - t) - 2t + 2 = 4

Now, let's simplify and solve for t:

-7 - t - 2t + 2 = 4

Combine like terms:

-7 - 3t + 2 = 4

-3t - 5 = 4

Add 5 to both sides:

-3t = 9

Divide both sides by -3:

t = -3

Now, substitute the value of t into the second equation to find z:

z = -7 - (-3)

z = -7 + 3

z = -4

So, the solution to the system of equations is t = -3 and z = -4.