Question

3.2-4d=2.3d+3

Answer 1

multiply all terms by 10 (yes, you can do that)
\[\implies 32 - 40d = 23d + 30\]
does that look easier?

Answer 2

Hold on let me try it out.

Answer 3

sure

Answer 4

3.2-42.3=30
Is that right so far?

Answer 5

how did you get -42.3?

Answer 6

wait...are we following the revised equation i wrote? or the question you wrote?

Answer 7

The equation you wrote.

Answer 8

so..what did you do?

Answer 9

3.2-40d=2.3d+30
-2.3d -2.3
3.2-42.3d=30

Answer 10

you mixed *your* question and *my* revised equation

Answer 11

what i wrote was

32 - 40d = 23d + 30 <--no decimals

Answer 12

Oh!

Answer 13

the whole point of multiplying everything by 10 was to get rid of the decimals

Answer 14

Okay okay let me try that one out.
That seems easier.

Answer 15

go ahead

Answer 16

Erg, I came out with a really long number.

Answer 17

Are you supposed combine like terms?

Answer 18

yes

Answer 19

Okay. hold on.

Answer 20

You add -40 and 23 right?

Answer 21

yes. add 40d to both sides

Answer 22

I added 40 to both sides and got
32=63d+30

Answer 23

Then I subtracted 30 from each side, and it came out as
2=63d

Answer 24

right. you're good so far

Answer 25

alright well I divided 63 to both and it came out as a long number.

Answer 26

exactly

Answer 27

something like 0.0317

Answer 28

Yeah!

Answer 29

that's right

Answer 30

But the answer in the back of the book says it's 2/63

Answer 31

then it's 2/63

Answer 32

\[2 = 63d\]
divide both sides by 63
\[\frac 2{63} = d\]

Answer 33

I thought you had to divide that though.

Answer 34

that's what you got originally wasn't it?

Answer 35

well if the book says it's 2/63 then you follow what it says

Answer 36

Okay, thanks! (:

Answer 37

welcome