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Question 2: How can you tell just by looking that the following system that it has infinitely many solutions? x+y=5 2x+2y=10
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Question 2: How can you tell just by looking that the following system that it has infinitely many solutions?

x+y=5
2x+2y=10

User Sahi
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1 Answer

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By looking at the system of equations, we can tell there are infinitely many solutions because it is proportional. In terms of proportionality, the first equation (x + y = 5) can be multiplied by 2 to result in the second equation (2x + 2y = 10).
User Nikita Tkachenko
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