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mash [69]
3 years ago
15

4. Explain and correct the error made by a student who simplified this expression.

Mathematics
1 answer:
Fiesta28 [93]3 years ago
3 0

Answer:

I notice that the first equation has a 7x, term and the second equation has a -7x term. These terms will cancel if we add the equations together—that is, we'll eliminate the the x terms:

Step-by-step explanation:

2y+7x= -5 + 5y-7x=12

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I don't know.  But I know how to find it.  Let's work it out together:

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Subtract  2x  from each side:    3x  =  20

Divide each side by  3 :              <em>x  =  20/3</em>  or    ( 6 and 2/3 ).


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Answer:

The answer is 19305

Step-by-step explanation:

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