Theofficialpereza
Theofficialpereza Theofficialpereza
  • 21-01-2018
  • Mathematics
contestada

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

d+e=15

-d+e=-5

Label the ordered pairs as (d,e).

Respuesta :

Dance4Life18
Dance4Life18 Dance4Life18
  • 21-01-2018
d+e=15
-d+e=-5 
The ds cancel out so
e=15
e=-5
Add both sides of equations together
2e=10
Divide by 2
e=5 

Substitute 5 for e in either equation:
d+5=15
Subtract 5
d=10

(10,5)
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