Respuesta :

altavistard

Answer:

(2,3)

Step-by-step explanation:

Because both equations involve the y-term -4y, elimination by addition/subtraction is a good choice as we solve this system of linear equations.

Multiply the 1st equation by -1, obtaining -x + 4y = 10; then add the 2nd equation to this result:

-x + 4y = 10

2x - 4y = -8

-------------------

x        = 2

Next, find y.  Substitute 2 for x in the first equation:  2 - 4y = -10.  Subtract 2 from both sides, obtaining -4y = -12.  Then y = 3.

The solution is (2,3).  

choixongdong

x - 4y = -10

2x - 4y = -8

-------------------------subtract

-x = - 2

x = 2

Substitute x = 2 into x - 4y = -10

2 - 4y = -10

-4y = - 12

  y = 3

Answer

Solution: x = 2 , y = 3 or (2 , 3)

Otras preguntas