cleo620 cleo620

21-11-2019
Mathematics

contestada

Find a solution to the following system of equations. -3x+3y=-9 -3x+y=7

Respuesta :

Yang100 Yang100

24-11-2019

Answer:

(-5, -8)

Step-by-step explanation:

-3x+3y=-9

-3x+y=7

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

simplify -3x+3y=-9 into x-y=3

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

y=x-3

-3x+y=7

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

-3x+(x-3)=7

-3x+x-3=7

-2x-3=7

-2x=7+3

-2x=10

x=10/-2=-5

y=-5-3=-8

x=-5, y=-8

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