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

Answer Link

Otras preguntas

I need help. I don't know how to solve the problem at all.
what kind of device can you use to to separate visible light into its different colors
Where does friction occur? Can it happen in liquids, air, with solids?
A 25.0 kg child on a swing kicks upward on the downswing thus changing the distance from the pivot point to her centre of gravity from 2.40 m to 2.28 m. What i
Tom has twice as many marbles as Luke. Together they have 39 marbles. How many marbles does Tom have?
List three examples of a primary economic activity?
Evaluate the expression when x = -2.5 1. -x 2. |x| + 3 3. |x| - 4 Help me please!!? D;
A sphere is dilated by a scale factor of 1.04 to create a new sphere. How does the volume of the new sphere compare with the volume of the original sphere?
What is the difference between evidence and inference?
What is the value of this please help