System of Equations

y=-x-1
y+x=3

Solve?

Question

21-04-2015
Mathematics

Answered

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System of Equations

y=-x-1
y+x=3

Solve?

Sagot :

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TSO TSO · Answer 1 · 2015-04-21T21:00:44-04:00

TSO TSO

21-04-2015

Solve by substitution

[tex]\sf{y=-x-1}[/tex]
[tex]\sf{y+x=3}[/tex]

Just plug in y=-x-1 into y+x=3

So we get:

[tex]\sf{(-x-1)+x=3}[/tex]

Simplify that:

[tex]\sf{-1=3}[/tex]

And since that is not true, that means this system of equations has no solutions!

Answer Link

Sagot :

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