# How do you solve y = 2x + 9 and 2x - y = -9?

There are infinite possible solutions because the equations are the same.

You get the same equation as the first one!

If you plot those into the same coordinate system, you see that there are an infinite amount of possible solves.

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To solve the system of equations y = 2x + 9 and 2x - y = -9, you can use the substitution method or the elimination method. Here, I'll use the substitution method:

From the first equation, y = 2x + 9. Substitute this expression for y in the second equation:

2x - (2x + 9) = -9

2x - 2x - 9 = -9

-9 = -9

Since this equation is true, the system of equations has infinitely many solutions, meaning the two equations represent the same line.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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