Posted by **carrie** on Tuesday, September 19, 2006 at 8:10pm.

5x+3-45 = 6x+9-30/1

you want to group like terms.

subtract the 5x from both sides, so you have

3-45= 6x-5x-30/1

you will then have

-42 = x -30

add 30 to both sides and you get

-12 = x

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