Question

Solve the following system of equations by linear combination:
2d + e = 8
d – e = 4


The solution is (5, –2).

The solution is (4, 0).
There is no solution.
There are an infinite number of solutions.

Answer 1

solution is 4,0..
add the equations.. you'll get 3d = 12 or simply, d = 4
put this in d - e = 4
you get e = 0