Answer:
The solution is d = 3 and e = -1
Explanation:
To solve using the substitution method, we need to first solve the second equation for d.
d - e = 4
d = e + 4
Now that we have the value of d, we can put it in for d in the first equation and solve for e.
d + e = 2
(e + 4) + e = 2
2e + 4 = 2
2e = -2
e = -1
Now that we have this value, we can plug it into the original equation and find d.
d + e = 2
d + -1 = 2
d = 3