Question

-2m + 13 = 2m - 3

Answer 1

should we start with the m's ?

Answer 2

combine like terms
4m = 16
m = 4

Answer 3

giving an answer is not going to help her learn.

Answer 4

I helped her do it

Answer 5

wait is it -4m ? when you combine it

Answer 6

2m+ 2m = 4m

Answer 7

13 + 3 = 16

Answer 8

i know but its -2m...?

Answer 9

so 4m = 16
divide by 4
m = 4

Answer 10

ohh thanks

Answer 11

so we have \[-2m + 13 = 2m - 3\]
now let's get rid of the -2m on the left hand side.
how would we do that?

Answer 12

make a guess :)

Answer 13

we add 2m ?

Answer 14

you can do -2m -2m = -4m
-3 - 13 = -16

-4m = -16
m = 4

it will still give you the same answer

Answer 15

yes you can add 2m over and get 4m

Answer 16

you got it!
add 2m to both sides

Answer 17

then -3 or add the 13 over either way you get the same thing...-16 or 16

Answer 18

\[(−2m+2m)+13=(2m+2m)−3\]
now what would that give us?

Answer 19

Do you understand how to combine like terms?

Answer 20

yes i get it now. thanks

Answer 21

it would give you 4 ?

Answer 22

yes

Answer 23

It's correct...but why 4?
\[(−2m+2m)+13=(2m+2m)−3\]
what's the intermediate step?
what do we have on the left hand side and the right hand side when we add 2m?
write it for me
13=?