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vlada-n [284]
3 years ago
13

Mr. Hartzel had 12 books in his home library. He bought 9 new books at the bookstore, then he sold 6 books. How many books does

Mr. Hartzel have now?
Mathematics
1 answer:
Basile [38]3 years ago
7 0

The number of books which Mr. Hartzel has now is:

  • 15 books

<h3>What is Algebra?</h3>

This refers to the use of calculations to solve mathematical problems. There are different ways in which algebra is used and this can include addition, subtraction, division, etc.

With this in mind,  we can see that Mr Hartzel had 12 books in his library

Then he got 9 new books and then sold off 6 books.

Therefore, the total number of books which he has now is:

12+9-6= 15 books

Read more about algebra here:
brainly.com/question/6143254

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cupoosta [38]
-4x + 6y = 12
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First solve for x in the second equation

x + 2y = -10
x = -10 - 2y

Now we have a value for x so we can substitute it into the other equation

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Now solve for y

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Now we have a value for y that we can plug into one of the original equations so we can solve for x

x + 2y = -10
x + 2(-2) = -10
x - 4 = -10
x = -6

Your solution set is

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