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Elis [28]
3 years ago
15

Find the non-permissible replacement for x in the expression 3-x/ 6+x

Mathematics
1 answer:
Mumz [18]3 years ago
7 0

Answer

x=3

Step-by-step explanation:

Equate the equation to zero

3-x/6+x=0

Cross multiply

3-x=0

Add x to both sides

x=3

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Step-by-step explanation:

A rectangular block has 3 parts that play into its volume.  length, width and height.  The question gives us length and width in the form of x and 3x, so height is what's missing.

It gives us a bit more information saying the sum of its edges is 20.  We also have to ask how many lengths, widths and heights are there.  That may be a bit hard to understand, but  is you are looking at a block I could ask how many edges are vertical, just going up and down.  These would be the heights.  There are 4 total, and this goes the same for length and width, so 4*length + 4*width and 4*height = 20.  

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Question doesn't give a specific value for x at all so you should be done there.  Any number you plug in for x should get you the right answer

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