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

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

User Cliff Viegas
by
7.8k points

1 Answer

5 votes
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)
User Mkll
by
8.3k points
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