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DaniilM [7]
3 years ago
5

How do you solve |3x|=18

Mathematics
2 answers:
algol133 years ago
7 0

<u><em>These are the steps:</em></u>

|3x|=3x        Convert the 3x to positive

x=6          Divide 3 to both sides

<u><em>Answer</em></u>: x=6


Oduvanchick [21]3 years ago
6 0

We can get two different equations from this:

3x = 18

and

3x = -18

So:

x = 6, x = -6

x = {6, -6}

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Can you please help me with this problem?
Hoochie [10]
Here you have to find which each variable is, for this you start of picking one equation,

x + 2y + 6z = 4
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4x + 2z = 16

depending the equation you pick you multiply that by a certain number that will give you the opposite of one of the other equations,
-1(x + 2y + 6z = 4)
= -x -2y - 6z = -4

With this you add or subtract it with the equation that has the same number or variable, or both,
In this case it will be the equation,
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You can use this one or the third equation since both have a positive 2y which will cancel with -2y from the new equation,
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= -4x -7z = -8
Now you since you just eliminated the variable (y) you now have 2 variables, and the last equation has only 2 variables, meaning now you find the answer to those to equations,

-4x -7z = -8
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= -5z = 8
Now leave the variable by itself,
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6 0
3 years ago
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