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

How do I solve y=5x-1 and y=15x-1
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2 votes
How do I solve y=5x-1 and y=15x-1

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User Roxdurazo
by
8.2k points

2 Answers

6 votes

\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 \\ (0)/(10) = (10x)/(10x) \\ 0=x \\ \\ y=5(0)-1 \\ y=0-1 \\ y=-1 \\ \\ solution:(0,-1)
answered
User Bibangamba
by
8.7k points
2 votes

5x-1=15x-1\Rightarrow x=0\Rightarrow y=-1
answered
User Alex Heyd
by
7.5k points
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