s1haPieraCharyg7irl s1haPieraCharyg7irl

25-05-2016
Mathematics

contestada

What is the solution of the system? Use elimination.
5x – y = 20
2x + y = 15
A) (5, 5)
B) (7, 35)
C) (7, 0)
D) (5, -5)

Respuesta :

Willchemistry Willchemistry

25-05-2016

{ 5 x - y = 20
2 x + y = 15
_____________
7 x = 35

x = 35 / 7

x = 5

For y :

2 x + y = 15

2*(5) + y = 15

10 + y = 15

y = 15 - 10

y = 5

Answer A ( 5,5 )

hope this helps!

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