Homework Help: 7th grade pre algebra

Posted by William on Thursday, November 6, 2008 at 8:30pm.

We need assistance solving

3 + 2(k+1) = 6 + 3k

I know the 2(k+1) has to become 2k + 2

then we have 3 + 2k + 2 = 6 + 3k
then we can subtract 3k from both sides to get
3 +2k + 2 - 3K = 6
But can I combine the 3+2 on the left
and the 2k - 3k to get -1k?

leaving us with 5 -1k = 6
-1k = 6-5
-1k = 1
k = -1

7th grade pre algebra - Ms. Sue, Thursday, November 6, 2008 at 8:32pm
Great! You are correct!
- 7th grade pre algebra - William, Thursday, November 6, 2008 at 8:35pm
  Thank you! I had figured it out four ways the wrong way. Don't know what I'm doing wrong. Think it may have to do with the MiDAS rule or something but cannot figure it out.
- 7th grade pre algebra - William, Thursday, November 6, 2008 at 8:39pm
  5/6t + 4 = 2 - 1/6t
  
  Is the best thing to do first in this case to get rid of the fractions? Should I turn them into decimals or multiply both sides by 6? And when I multiply by 6, do I multiply each factor by 6. SO it becomes
  
  5t + 4(6) = 2(6) -t
  ?
  Thanks.
  - 7th grade pre algebra - Catie, Wednesday, November 19, 2008 at 4:56pm
    z/6 + 11 > -49
    
    This is my problem for homework and I don't know how to do it. My teacher showed us but I guess it didn't get throw to me. ?????????????? Help
7th grade pre algebra - Writeacher, Thursday, November 6, 2008 at 8:39pm
PEMDAS is the order of operations!
(Please excuse my dear Aunt Sally = PEMDAS mnemonic = easier to remember)
Parentheses
Exponents
Multiply
Divide
Add
Subtract

http://www.mathgoodies.com/lessons/vol7/order_operations.html
- 7th grade pre algebra - Kim, Wednesday, November 12, 2008 at 4:15pm
  What is The Answer To This Question Below?
  Evaluate (m-3.2)(m+4.1)when m=-4.1
  - 7th grade pre algebra - Rebecca**, Sunday, November 16, 2008 at 5:27pm
    idk
7th grade pre algebra - Sibu, Tuesday, November 18, 2008 at 7:22pm
how do i solve the problem3(z-2)+6=5(z+4)
7th grade pre algebra - alyssa, Tuesday, December 2, 2008 at 9:13pm
what is the answer to.. round the difference of two hundred and seven-tenths and one hundred twenty-nine and nine tenths to the nearest whole number?
7th grade pre algebra - Anonymous, Saturday, January 31, 2009 at 8:02pm
8
7th grade pre algebra - $Mikey$, Saturday, January 31, 2009 at 8:03pm
9
7th grade pre algebra - guygtutyv, Wednesday, May 6, 2009 at 8:22pm
the key is to try its very clear. Just use your distributive property when its ilke 3(3*4) . Your just nervous because it looks like a big problem
7th grade pre algebra - Brittany, Tuesday, January 12, 2010 at 5:52pm
66 2/3 of 120?
simplifying expressions - jitzell, Thursday, April 8, 2010 at 2:20am
12 . -12 = p
7th grade pre algebra - Roni, Tuesday, September 7, 2010 at 5:12pm
I have a problem solving a math problem in my sons math book. We have figured out all except this one. Please Help.. I need to insert parentheses to make this xpression equial 20

7+3.3-1+7

Thank You....
7th grade pre algebra - jewels, Thursday, September 9, 2010 at 5:24pm
how to simplify 2p+22q squared-p
7th grade pre algebra - kosty, Monday, October 11, 2010 at 7:24am
y=2x
7th grade pre algebra - bob, Wednesday, October 20, 2010 at 3:39pm
i like chicken
7th grade pre algebra - Mo, Thursday, October 20, 2011 at 7:07pm
that is not a legitiment question
7th grade pre algebra - Jake, Sunday, January 15, 2012 at 3:31pm
The Answer is: Chicken Wings
7th grade pre algebra - as if, Monday, April 2, 2012 at 10:51pm
haha fantastic -_-

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