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Rosalinda Blick
Wiki User
∙ 14y agoX + Y = 9 and X - Y = 3
Since 9 is three times 3, then
X + Y = 3 (X - Y)
which means that
X + Y = 3X - 3Y
so if we subtract X from both sides, we get
Y = 2X - 3Y
and if we then add 3Y to both sides, we get
4Y = 2X
then divide both sides by 2, giving us
2Y = X
Now, if we replace X with 2Y in the original equations, that gives us
2Y + Y = 9 and 2Y - Y = 3
Or,
3Y = 9 and Y = 3
Now we know that Y = 3 and 2Y = X, so I'll leave the last step (figuring out X) for you to do.
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42
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What is xy plus z equals 9 for y?
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What is -9 plus 3 equals?
-9 + 3 = -6
4xy plus 1 equals 3y-7x solve for y?
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If 2 plus 3 equals 10 and 7 plus 2 equals 63 and 6 plus 5 equals 66 and 9 plus 7 equals 96 9 plus 7 equals what?
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-9 plus 6 equals 3?
-9 + 6 = -3.
What is 6 plus 3 equals?
9
If 5 plus 3 equals 23 3 plus 8 equals 35 6-2 equals -8 4 plus 9 equals 49 1 plus 3 equals 7 then 4 plus 1 equals?
42
What is 4x plus 3 equals 2x plus 9?
x=3
2 plus 3 equals 10 and 7 plus 2 equals 63 and 6 plus 5 equals 66 and 8 plus 4 equals 96 Then 9 plus 7 equals?
If I am correct, 9 plus 7 equals 112.
Negative3 plus 9 equals?
-3+9 is the same as 9-3=6
What is n plus 9 when n equals 3?
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