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Mathematics
Titus Douglas
4 December, 22:22
X + 4y = - 6
2x - 5y = 1
+5
Answers (
1
)
Harold Gomez
4 December, 23:36
0
x=-2
y=-1
Step-by-step explanation:
x+4y=-6
-4y to both sides
x=-6-4y
2x-5y=1
add 5y to both sides
2x=1+5y
divide both sides by 2
x=1/2+5/2y
set equal to each other
-6-4y=1/2+5/2y
add 6 to both sides
-4y=6 1/2+5/2y
subtract 5/2y from both sides
-13/2y=6 1/2
divide by - 13/2 on both sides
y = - 1
plug that into original equation
x+4 (-1) = -6
x-4=-6
add 4 to both sides
x=-2
(you can check your answer by plugging both back into your original problem and seeing if it equals out)
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