# How to solve this system of equation using matrices? Please don't make it too complicated because I still have some more to solve like this. I'm gonna use your answer as my guide :)

First form an augmented matrix with the coefficients on the left and the constants on the right in the augmented column. It isn't possible to format an augmented matrix, so I will use bolden text in the last column to represent the augmented part.

Matrix:

We need to convert this to an upper triangular matrix using row operations. It should look like the matrix below.

The notation for the row operations will be:

This means, row 2 is row 2 + 3 times row 1.

From this we can see:

Now use back substitution in 2nd row:

In 1st row:

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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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