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−4x + y = 6 −5x − y = 21
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1 vote
−4x + y = 6
−5x − y = 21

User Hessuew
by
8.3k points

1 Answer

3 votes
assuming x=x and y=y in both equations
add them together

-4x+y=6
-5x-y=21 +
-9x+0y=27
-9x=27
divide by 9
-x=3
multiply -1
x=-3

subsiutte
-4x+y=6
-4(-3)+y=6
12+y=6
subtract 12
y=-6



x=-3
y=-6
the soultion set is in (x,y) form
(-3,-6)
User Eduardo Moniz
by
8.4k points
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