how do i use systems of equations to eliminate two problems that are: -9x+2y=-24 and -x+2y=8

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08-05-2017
Mathematics

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how do i use systems of equations to eliminate two problems that are: -9x+2y=-24 and -x+2y=8

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apologiabiology apologiabiology · Answer 1 · 2017-05-08T21:46:08+02:00

apologiabiology apologiabiology

08-05-2017

eliinate y's
multiply top eqatyion by -1 and add to 2nd

9x-2y=24
-x+2y=8 +
8x+0y=32

8x=32
divid both sides b y8
x=4

sub back

-x+2y=8
-4+2y=8
add 4 to both sides
2y=12
divide both sides by 2
y=6
(x,y)
(4,6)

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