aleramirez040504 aleramirez040504
  • 14-09-2020
  • Mathematics
contestada

2x - 7y = 2 and 3x + y = -20 addition/elimination

Respuesta :

samkr14
samkr14 samkr14
  • 14-09-2020

Answer:

x = -6, y = -2

Step-by-step explanation:

2x-7y = 2

3x + y = -20

We need to cancel out either x or y to solve the equation. I'll cancel out x first

3(2x-7y = 2)

-2(3x+y=-20)

___________

6x-21y = 6

-6x -2y = 40

____________

-23y = 46

y = -2

Plug the value for y in one of the 2 equations to solve for x

2x -7(-2) = 2

2x+14=2

2x = -12

x=-6

Answer Link

Otras preguntas

In The Old Man and the Sea, how does the setting of Santiago’s shack affect the story? Select the two correct answers. Readers understand that Santiago wants to
If you are the next President of the Republic of the Philippines, how will you address the problems of poverty in our country?
solve the following equation: (Find x) a) (x-5)²+(2x-10)(x+3)-x²+25​
Terry has 3 pairs of pants: black, khaki, and brown, and 4 shirts: yellow, red, blue, and white. He does not care which colors he wears together. If Terry choos
what stops the earth from moving away from the sun ?
Why did enslaved africans replace enslaved native americans in the americas
I am so confused pls help me because I can't see what she did wrong.
Hey everyone! How's everyone doin'?What do you mean by parliamentary form of government?P.S: This is civics​
why is 16 a rational number
TEXT ANSWER Describe why the adaptation that Viceroy butterflies use is so successful.