i dont know how to do this

please explain

Thanks

i dont know how to do this

please explain

Thanks

Tutors, please sign in to answer this question.

Woodland Hills, CA

-6X - 6Y = 6

-6X +3Y = -12

Simplify both equations:

X + Y = -1

2X - Y = 4

3X = 3

X =1

Y =-2

Middletown, CT

Hi Angelica;

-6x-6y=6

-6x+3y=-12

Let's subtract the second equation from the first...

-6x-(6x)=6x+6x=0

-6y-3y=-9y

6--12=6+12=18

0-9y=18

The x is eliminated...

-9y=18

Let's divide both sides by -9...

(-9y)/-9=18/-9

Let's plug this into either equation to establish the value of x.

I randomly select the first equation...

-6x-6y=6

-6x-[(6)(-2)]=6

-6x-(-12)=6

Subtracting a negative number is identical to adding a positive number...

-6x+12=6

Let's subtract 12 from both sides...

-6x+12-12=6-12

-6x=-6

Let's divide both numbers by -6...

(-6x)/-6=-6/-6

Let plug both values into the second equation to verify...

-6x+3y=-12

[(-6)(1)]+[(3)(-2)]=-12

-6+-6=-12

-12=-12

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