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Mathematics 14 Online
OpenStudy (anonymous):

46-2r+3r=53

OpenStudy (anonymous):

first simplify by cimbining like terms then solve

OpenStudy (anonymous):

Okay so what are the like terms here?

OpenStudy (anonymous):

2r and 3r

OpenStudy (anonymous):

-2r and 3r, don't forget that it's -2r. So combine them. What do you get when you combine -2r with 3r?

OpenStudy (anonymous):

positive 5

OpenStudy (anonymous):

negative 5

OpenStudy (anonymous):

What is -2r+3r?

OpenStudy (anonymous):

o

OpenStudy (anonymous):

positive 2 right

OpenStudy (anonymous):

How do you get 2? You're adding -2r+3r, where does 2 come from?

OpenStudy (anonymous):

o pellet my bad

OpenStudy (anonymous):

i mean its its 5

OpenStudy (anonymous):

What? Where are you getting that??

OpenStudy (anonymous):

TELL ME THE DANG ANSWER

OpenStudy (anonymous):

No. I'm not going to tell you the answer, because then you won't learn how to do this basic manipulation of variables, and then you won't be able to learn the next thing, because it will build on this.

OpenStudy (anonymous):

Just like you can't do this yet because you apparently didn't learn the previous thing of how to add two numbers together. -2+3 equals what? -2r+3r equals what? You must be able to do this yourself.

OpenStudy (anonymous):

this is an equation

OpenStudy (anonymous):

-2 plus 3 is negative 5

OpenStudy (anonymous):

No, -2 plus 3 is not negative 5.

OpenStudy (anonymous):

\[-(2+3)=-5\\ -2+3\ne-5 \]

OpenStudy (anonymous):

yes because 2 plus 3 is five and a negative plus a positive is a negative

OpenStudy (anonymous):

A negative plus a positive is not always a negative. A negative times a positive is always a negative, but a negative plus a positive is not.

OpenStudy (anonymous):

If you have a negative plus a positive, -a+b, you can rewrite that as b-a. Negative two plus three is the same as three minus two.

OpenStudy (anonymous):

how

OpenStudy (anonymous):

its 1

OpenStudy (anonymous):

Yes, -2+3=1

OpenStudy (anonymous):

D: you must think im dumb

OpenStudy (anonymous):

So -2r+3r=?

OpenStudy (anonymous):

1

OpenStudy (anonymous):

how is it a positive

OpenStudy (anonymous):

No. What did you do with the r? You can't just get rid of the r.

OpenStudy (anonymous):

What is r+r?

OpenStudy (anonymous):

2r

OpenStudy (anonymous):

Okay. What is 2r-r?

OpenStudy (anonymous):

1r

OpenStudy (anonymous):

r

OpenStudy (anonymous):

Right. So you have -2r+3r, which is the same as 3r-2r. So, what is 3r-2r?

OpenStudy (anonymous):

1r

OpenStudy (anonymous):

isnt the answer 99

OpenStudy (anonymous):

Yes. There you go, you have combined like terms. Congratulations :) So now you have 46+r=53. Subtract 46 from both sides and you're done.

OpenStudy (anonymous):

No, the answer is not 99.

OpenStudy (anonymous):

o i added

OpenStudy (anonymous):

To test an answer, plug it back into the original equation and see if it works.

OpenStudy (anonymous):

its 7

OpenStudy (anonymous):

Correct.

OpenStudy (anonymous):

ty so much im so confused when it comes to negative and positives and all that pellet

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