lmontagna71114 lmontagna71114
  • 06-03-2020
  • Mathematics
contestada

{x-2y=11
3x-y=13

I need help solving the system.

Respuesta :

santiagodaa
santiagodaa santiagodaa
  • 06-03-2020

Answer:

y = -4

x = 3

Step-by-step explanation:

let’s call it 1.    x - 2y = 11

Let’s call it 2.  3x - y = 13

___________

lets multiply 2 by 2

(3x - y = 13) 2

this is 3 6x - 2y = 26

___________

Now, let’s substract. 3 from 1

x - 2y = 11

- (6x - 2y = 26)

= -5x = - 15

5x = 15

x = 15/5

x = 3

__________

now, lets solve equation 1 with the value of x.

x - 2y = 11

3 - 2y = 11

- 2y = 11 - 3

-2y = 8

2y = -8

y = -8/2

y = -4

Mark brainliest please ;)

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