anonymous
  • anonymous
4(j-7)=12
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
jim_thompson5910
  • jim_thompson5910
Hint: either distribute to get 4j - 28 = 12 or divide both sides by 4 to get j - 7 = 3
anonymous
  • anonymous
Wouldn't it be 4j-28=12

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jim_thompson5910
  • jim_thompson5910
thats one way to go, what do you get when you solve that
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
I add 28?
geerky42
  • geerky42
Yes.
geerky42
  • geerky42
Then divide both sides by 4.
anonymous
  • anonymous
Ok thank you :)
geerky42
  • geerky42
Glad we helped.
anonymous
  • anonymous
7(2p+3)-8=6p+29
anonymous
  • anonymous
14p+21-8=6p+29 ?
jim_thompson5910
  • jim_thompson5910
good so far
jim_thompson5910
  • jim_thompson5910
what's next
anonymous
  • anonymous
Subtract 6p?
jim_thompson5910
  • jim_thompson5910
yep
jim_thompson5910
  • jim_thompson5910
14p+21-8=6p+29 14p+21-8 - 6p = 29 then what
anonymous
  • anonymous
8p+21-8=29?
jim_thompson5910
  • jim_thompson5910
good, next step?
anonymous
  • anonymous
Add 8? I don't know
jim_thompson5910
  • jim_thompson5910
or you can combine 21-8 to get 13 this gives you 8p+13 = 29 then you can subtract 13 from both sides to get 8p = 29-13
anonymous
  • anonymous
Ohh
jim_thompson5910
  • jim_thompson5910
so 8p = 16 p = ??
anonymous
  • anonymous
2
jim_thompson5910
  • jim_thompson5910
you got it
anonymous
  • anonymous
:)
anonymous
  • anonymous
3x-9=7.5+5x
anonymous
  • anonymous
Butterfly!! :)
anonymous
  • anonymous
Haha here I am :o) 3x-9=7.5+5x What do we do first? I know you know it :o)
anonymous
  • anonymous
subtract 5x?
anonymous
  • anonymous
Think of it like this: 3-5 or 5-3? :o)
anonymous
  • anonymous
5-3
anonymous
  • anonymous
-9=7.5+2x
anonymous
  • anonymous
Fantastic! Now, solve for x! Tell me what you do next :o)
anonymous
  • anonymous
add 9?
anonymous
  • anonymous
Nope. Remember, when you take from one side, you must take from the side with the x. So instead, take the 7.5 from the side with the x. :o)
anonymous
  • anonymous
Ohh so -7.5
anonymous
  • anonymous
You got it! :o)
anonymous
  • anonymous
x=-8.25
anonymous
  • anonymous
Great job! I knew you could do it. :o)
anonymous
  • anonymous
a-5/10=2a-3/5
anonymous
  • anonymous
a=1/10
anonymous
  • anonymous
\[\frac{ a-5 }{ 10 }=\frac{ 2a-3 }{ 5 }\] Cross multiply :o) \[10(2a-3)=5(a-5)\] Distribute \[20a-30=5a-25\]\[15a-30=-25\]\[15a=5\]\[a=\frac{ 5 }{ 15 }\]\[a=\frac{ 1 }{ 3 }\] Do you see how I got that? :o)
anonymous
  • anonymous
Wait which do I cross multiply?
anonymous
  • anonymous
For the original equation, you're first going to cross multiply. So, a-5 times the 5, and then the 2a-3 times the 10.
anonymous
  • anonymous
I'm still not seeing it :/
anonymous
  • anonymous
I have some family coming over in 15 minutes and I have to go with them to town. Will you be on later so we can do this later?
anonymous
  • anonymous
Yup, I'll type up some instructions on that one and message it to you for when you get back. :o)
anonymous
  • anonymous
Ok thank you! Talk t you soon :)

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