s+t=-4 s-t=2

s = -1
t = -3

To find the values of s and t, we can solve the system of equations using the method of substitution.

Given the equations:
1) s + t = -4
2) s - t = 2

We can solve equation 2) for s:
s = t + 2

Substituting this value of s into equation 1):
(t + 2) + t = -4
2t + 2 = -4
2t = -6
t = -3

Substituting the value of t back into equation 2) to solve for s:
s - (-3) = 2
s + 3 = 2
s = -1

Therefore, the values of s and t are:
s = -1
t = -3