Question

9t - 6 - 6t = 6

Answer 1

combine the like terms -9t-6t=-15t
6+6=12
t=-12/15=-4/5

Answer 2

if you have 9 t's and take away 6 t's how many t's do you have left ?

Answer 3

3 t's

Answer 4

sorry for the minus sign its 9t-6t=3t

Answer 5

yes. that means you can simplify
9t - 6 - 6t = 6
to
3t -6 = 6 (we simplified 9t-6t to 3t)

now add +6 to both sides. we write +6 on both sides:
3t - 6 + 6 = 6 + 6

can you simplify the right side? what is 6+6
on the left, what is -6+6 ?

Answer 6

0

Answer 7

and on the right side ?

Answer 8

12

Answer 9

so that means
3t - 6 + 6 = 6 + 6
is simplified to
3t +0 = 12

3t+0 is still 3t (adding 0 does not change it)
so

3t= 12

last step: divide both sides by 3

(3/3)t = 12/3
and simplify

Answer 10

Oh, I understand. Thank you!

Answer 11

If you have time (or questions) Khan's videos are good
http://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-variables-expressions/cc-7th-2-step-equations/v/why-we-do-the-same-thing-to-both-sides-two-step-equations

(if the link does not show properly, refresh your browser)

Answer 12

Yeah, I use that sometimes