Solve for the Unknown Variable
7t+9=37
n+12=-2(3-5n)
2k+9
_____=7
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
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