jerryhoward695
jerryhoward695 jerryhoward695
  • 19-06-2018
  • Mathematics
contestada

What is the solution to the system of equations?

y = x – 10

2x + y = 4

(–8, 6)
(–6, 16)
(6, –8)
(16, –6)

Respuesta :

altavistard
altavistard altavistard
  • 19-06-2018
Substitution would be a great approach to solving this system, because the first equation defines y as x - 10 and you can thus substitute x - 10 for y in the second equation:

2x + (x - 10) = 4

Then 3x - 10 = 4, and 3x = 14.  Solving for x:  x = 14/3.

Since y = x-10, subst. 14/3 for x to find y:  y = 14/3 - 30/3 = -16/3

The solution is (14/3, -16/3).
Answer Link
Аноним Аноним
  • 08-02-2021

Answer:

C.(6, –8)

Hope its right

Step-by-step explanation:

Answer Link

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