Question

Simplify by combining like terms note: there are not equations DO NOT SOLVE
12r-21s+r+15r

Answer 1

@mathmale

Answer 2

you can only add the numbers that have the same variables attached to them

so you CAN add 12r + r + 15r
but you CAN'T add 12r - 21s

Answer 3

so my final answer is 28r+12r-21s

Answer 4

how did you get 28r ??

Answer 5

I added the 12 and 15 and then the r

Answer 6

ohhh yeah I see
but that means you wouldn't have that 12r anymore right?

Answer 7

so whats my final answer

Answer 8

28r+12r-21s is really close
you just don't need the 12r :)

Answer 9

wait so that's my answer

Answer 10

without the 12r
yes

Answer 11

could you re write it cause im confused

Answer 12

SO Its 28r-21s that's it

Answer 13

yup! :)