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Krish Gillespie
Mathematics
13 August, 07:18
What is the soulotion x+y=3, y=-x-1
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Nana
13 August, 07:35
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The answer to x+y=3 is x=2 y=1. To y=-x-1 is x=2 y=-1
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Shyla Barron
13 August, 07:36
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So iff you subitute y=-x-1 into the other equation (x+y=3)
you get x + (-x-1) = 3 then you get x-x-1=3 which is a false statment
if you change it so that y=-x-1=x+y=-1
y=-x-1
add x to both sides
x+y=-1
but the first equation said that x+y=3 so therefore the values of x and y in the two are not the same because x+y cannot equal 3 and - 1 at the same time
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