Question

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

d + e = 15
–d + e = –5

Label the ordered pair as (d, e). (4 points)


Select one:


a. (0, 0)

b. (10, –5)

c. (5, 10)

d. (10, 5)

Answer 1

(10, 5)

Explanation:

Answer 2

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

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

therefore: d=10; e=5

Answer: d.(10,5)