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October 21, 2014

October 21, 2014

Posted by **holiday** on Sunday, March 27, 2011 at 7:42pm.

3x+6=5x+1 ?

2n+6=8N+3 ?

6N+9=9n+6 ?

- 7th grade math -
**Damon**, Sunday, March 27, 2011 at 7:55pmIf you can do one, you can do them all:

2x+7=4x+3 we want x terms alone on the left so subtract 4x from both sides

-2x + 7 = 3 we want the numbers alone on the right so subtract seven from both sides

-2x = -4 we want the coefficient of x to be one so divide both sides by -2

x = 2

now check

2(2) + 7 = 4(2) + 3 ????

4 + 7 = 8 + 3 ???

11 = 11 sure enough

- 7th grade math -
**Ms. Sue**, Sunday, March 27, 2011 at 8:04pm2x+7=4x+3

You need to get the knowns on one side of the equation and the unknowns on the other side.

Subtract 2x from both sides.

7 = 2x + 3

Subtract 3 from both sides.

4 = 2x

Divide both sides by 2

4/2 = x

2 = x

Do the others the same way.

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