1. Last thread for the Day

Solve for the Unknown Variable

7t+9=37

n+12=-2(3-5n)

2k+9
_____=7
3

2. Is this the last problem?

$\displaystyle \frac{2k + 9}{3} = 7$

Show us what you got so far. I'll give you a hint in the last one -- multiply both sides by 3 first.

01

3. Alright so what you do to one side you do to the other so ill give it a try....

7t+9=37

7t+9-9=37-9

t=28

7t divided by 7 cancels it out

28 divided by 7 equals 4
t= 4?
the brackets confuse me on number 2, anywhoo im going to the gym to relieve some stress, sorry if im annoying you. exams are stressful man

4. For #2 you use foil.

n+12=-2(3-5n)

So you would multiply -2 by 3, and then -2 by -5n so you would essentially get

n+12=-6+10n
n-10n=-6-12
-9n=-18

And then just like what you just did, you want to divide out the -9 so you can get n by itself and then you would be left with:
n=2

5. Originally Posted by peekay
For #2 you use foil.

n+12=-2(3-5n)
Sorry to nitpick, but actually, it's the distributive property. At least that's what we call it where I live.

01