Question

Solve the system of equations and choose the correct answer from the list of options.

Answer 1

We can solve this system of equation by reduction method.
  d+e=15
 -d+e=-5
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      2e=10   ⇒e=10/2=5

-(d+e=15)
 -d+e=-5
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  -2d=-20   ⇒d=-20/-2=10

therefore: d=10; e=5

Answer: d.(10,5)