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Solve the following system of equations by linear combination:


3d – e = 7

d + e = 5



The solution is (3, 2).

The solution is (2, –1).

There is no solution.

There are an infinite number of solutions.

Answer :

dannielle
3d - e =7
d  + e = 5
-------------
4d  /  = 12
d=12:4
d=3

3+e=5
e=5-3
e=2
the solution is (3,2)

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