odinmorton
odinmorton odinmorton
  • 01-01-2019
  • Mathematics
contestada

solve this system of linear equations. Separate the x- and y-values with a comma. 20x = -58 - 2y 17x = -49 - 2y

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 01-01-2019

Answer:

(-3,1)

Step-by-step explanation:

20x = -58 - 2y

17x = -49 - 2y

I will use elimination to solve this system of equations

Multiply the second equation by -1

-1* 17x = -1 *(-49 - 2y)

-17x = -49 +2y

Add the first equation and the modified second equation

20x = -58 - 2y

-17x = +49 +2y

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

3x   = -9

Divide each side by 3

3x/3 = -9/3

x=-3

But we still need to find y

17x = -49 -27

17*-3 =-49 -2y

-51 = -49 -2y

Add 49 to each side

-51+49 = -49+49 -2y

-2 = -2y

Divide by -2

-2/-2 = -2y/-2

1 =y

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