Question

(2/7)r + 2r = (1/2)r + (17/2)

Solve for r.

Answer 1

I'm not really sure where to start :(

Answer 2

ok, ill help,

Answer 3

future warning, i might suddenly leave, but thats because my cp froze. sorry!

Answer 4

I'll help then.

Answer 5

That's okay :) I apprciate the help

Answer 6

ok, oaktree, go right ahead.

Answer 7

So, first you want to multiply each term by 2 to get rid of the fractions.

Answer 8

You get 4/7r+4r=r+17

Answer 9

Then multiply each term by 7 to get rid of the other fraction

Answer 10

Oh! I see it's about getting rid of the fractions?

Answer 11

And you get 4r+28r=7r+119

Answer 12

No, it just makes it easier to solve.

Answer 13

not exactly, but its helpful to simplify the, your goal is to isolate the r

Answer 14

to simplify them*

Answer 15

So then you can simplify and get 25r=119

Answer 16

Oh! That makes sense. My professor kept telling me to multiply everything by 14

Answer 17

That also works because it is really doing both at once, but it's simpler to do them in two steps to prevent mistakes.

Answer 18

From 25r=119, you can easily get r=119/25.

Answer 19

That's where I got confused! Thank you both sooo much!

Answer 20

Which I don't believe can be simplified.

Answer 21

So that's your final answer.

Answer 22

You're welcome!

Answer 23

Anything else I missed, mathfreak?

Answer 24

You O.K. there?

Answer 25

oaktree, is that right? mustn't you multiply it to the other side as well( simple an important rule, you can do something to one side of the equation, as long as you do the same to the other side.)

Answer 26

What do you mean?

Answer 27

Multiply what?

Answer 28

If you mean the 2 and the 7, I did multiply both sides. Check my equation, maybe I messed it up somewhere.

Answer 29

ya, i noticed that. did you inform her about it?

Answer 30

sorry, this site crashes my cp,

Answer 31

Yeah I saw it.