Question

Help please?
A teacher wrote expressions on cards and put them in a bag. Thomas and Kelly drew cards from the bag and added the expressions. Thomas drew the expressions 3x + 7 and 2x – 3. Kelly drew the expressions −6x + 3 and 14x + 2.

How much greater was Kelly’s sum than Thomas’s sum?

Answer 1

math

Answer 2

what? @MyPhilHillName

Answer 3

Ok, hello there! @ilovecrayons

Answer 4

hi

Answer 5

Let's first find the sum of Kelly's, shall we?

Answer 6

okay

Answer 7

-6x + 3
14x + 2

We need to add these two expressions

-6x + 3 + 14x + 2 = ??

Can you add them? :)

Answer 8

yes

Answer 9

Ok, tell me what you get :)

Answer 10

okay. thanks!

Answer 11

remember, this isn't your final answer :)

Answer 12

i got -8x+5

Answer 13

is that right?

Answer 14

kinda correct

what is -6x + 14x = ?

Hint: -6x + 14x = x(-6 + 14) = x(14-6) = ??

Answer 15

okay, so x(14-6), no negatives? it is 8x?

Answer 16

correct :)

Answer 17

yay! okay, so how do I get the final answer?

Answer 18

Now we need to find the sum of Thomas's expressions

3x + 7
2x - 3

3x + 7 + 2x - 3 = ??

Answer 19

got it. okay. so 3x+2x-3= 5x + 4

Answer 20

Is that right?

Answer 21

correct :)

Answer 22

great! what do i do now?

Answer 23

Now we need to find the difference of Kelly's sum from Thomas's sum

Answer 24

so

\(\sf\Large 8x + 5 - (5x + 4) = 8x + 5 - 5x - 4 = ??\)

Answer 25

is it 1+3x?

Answer 26

and that's your answer :)

Answer 27

yay! thanks so much!

Answer 28

Great work, and thanks for cooperating! :D