Naomi asked several classmates how much cash they had in their pocket. She recorded the data below:
1 answer:
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The answer is 15000
3000*6=1800
3000*-2=-6000
18000-6000=12000
12000+3000=15000
3000*6=1800
3000*-2=-6000
18000-6000=12000
12000+3000=15000
Um.. Both of those equations are the exact same. Divide both sides of the first equation by 6. You get:
That is the exact same as the second equation. This system has an infinite number of solutions. 5x - 7y = -1 is a line, so basically every point on that line is a solution to the system.
For example,
and 
would work, but so would 
and 
That is the exact same as the second equation. This system has an infinite number of solutions. 5x - 7y = -1 is a line, so basically every point on that line is a solution to the system.
For example,
