how do I solve y=5x-1 and y=15x-1

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15-03-2015
Mathematics

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how do I solve y=5x-1 and y=15x-1

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Hippalectryonidn Hippalectryonidn · Answer 1 · 2015-03-15T18:55:48-04:00

Hippalectryonidn Hippalectryonidn

15-03-2015

[tex]5x-1=15x-1\Rightarrow x=0\Rightarrow y=-1[/tex]

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Iloveonedirectionidn Iloveonedirectionidn · Answer 2 · 2015-03-15T19:03:37-04:00

Iloveonedirectionidn Iloveonedirectionidn

15-03-2015

[tex] \left \{ {{y=5x-1} \atop {y=15x-1}} \right. \\ \\ (5x-1)=15x-1 \\ (5x-1)+1=(15x-1)+1 \\ 5x=15x \\ (5x)-5x=(15x)-5x \\ 0=10x \\ \frac{0}{10} = \frac{10x}{10x} \\ 0=x \\ \\ y=5(0)-1 \\ y=0-1 \\ y=-1 \\ \\ solution:(0,-1)[/tex]

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