Question

What is the solution to the system equations?
Use the substitution method.
d+e=2
d-e=4

Answer 1

All you've to do is finding the value of one variable with respect to the other. Putting it on the other equation.


*the substitution method:
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d+e = 2
d = 4+e

(4+e)+e = 2

4 + 2e = 2
2e = -2
e = -1
d = 4 - 1= 3