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).
O (0, 0)
O (10,-5)
O (5, 10)
O (10,5)

Answer 1

9514 1404 393

Answer:

d. (10, 5)

Explanation:

Add the two equations, and you get ...

2e = 10

e = 5

Solve the first one for d and you have ...

d = 15 -e

d = 15 -5 = 10

So, the solution is ...

(d, e) = (10, 5) . . . . . matches the last choice

_____

Check

d + e = 10 + 5 = 15

-d + e = -10 +5 = -5