minerva2005hernandez minerva2005hernandez

07-04-2020
Mathematics

contestada

Solve the following system of equations by elimination. Express
the solution as an ordered pair (x, y).
-x- 3y = 20
4x + 3y = 1

Respuesta :

juls1816 juls1816

07-04-2020

Add the two equations together with the same variables

-x+4x=3x
-3y+3y=0
20+1=21

You now get

3x=21

Divide and find x =7

Plug in x to the equation to find y
Y=-9

(7,-9)

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