Scribepost for today.

Harbeck gave us questions that will probably be on the test because he clearly said "I'm lazy".

these are all the questions : n-6= 14

n+9= -4

-9+n= 17

25= -12+n

n- (-6)= 15

-n/ 5= 6

-30n = 180

1/4n= 12

n/4=12

- 1/5n= 10 [ NOTE: the negative sign is in the middle so you can choose which one you'd rather put it on ]

12n= 48

I'm guessing that most of those questions will be on the test. I want to choose 1 that i will solve with algebra tiles and the other way? ( i don't remember what it's called ) .

i chose , n+9= -4

easy right? First you need to isolate the "n". To isolate it you need to cancel out the +9 to do that you need a zero pair. This picture below explains most of it. In the picture i forgot to write VERIFY, but the (-4 = -4 ) pretty much explains it.

I also want to do this one in algebra tiles .

I'm sorry it's blurry but it was way bigger when i made it. This picture actually took a long time to make so i don't really want to make anymore. I'm sorry but i will solve 3 more other questions.

25= -12+n for this one you can turn it around so it's easier to solve.

so it can be 12+n= 25

the next thing you need to do is ISOLATE , all the steps together are " ICOBV " which means , isolate; cancel - opposites ; balance and verify.

-12 + 12 +n = 25 - 12

n = 13

REWRITE :

12+n=25

12+13= 25

25=25

The next question i will do is : - 30n = 180

you need to divide since this dividing is the opposite of multiplying

n = 180 / -30

n = -6

this might look confusing but it's not . N = 180 divided by -30 .

i don't know if mr. Harbeck did it like this but the answer still seems to be right.

rewrite it : -30n = 180

-30(-6) = 180

180 = 180

next question : 12n = 48 "/ " means divide by [opposite of multiply is divide]

12n / -12 = 48 / -12

isolates n = 48 / 12

n = 4

rewrite it ! 12n= 48

12(4) = 48

48 = 48

I'm sorry , if it wasn't understandable or if any of them are wrong .

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