Help, math homework, please.

[kristian]

I just got back to school and i need help with this, i forget it.

I need to know the value of "n", can somebody please explain it?

4 (2n - 5) = 3n + 10

[bugmann]

4 (2n - 5) = 3n + 10
(simplify the brackets...)

8n - 20 = 3n + 10

(-3n from each side)

5n - 20 = 10

(+20 on both sides)

5n = 30

(divide by 5 to break it down to just one n)

n = 6

replace n with 6 to check if its right

[kristian]

thanks! I just needed a refresher.

If i could rep you i could.

Can sombody rep him on my behalf?

[bugmann]

dont worry man, its cool. always a pleasure to help

[liebherk]

man, and I thought vector cross products were confusing.

[freedom skating_england]

What year of school are you in? In one year you do a hell of a lot of that sorta stuff.

[skyfire111]

That shit is hard but eventually you'll get it.

[kfskater661]

first you need to distribute

so... 8n-20=3n+10

Then you have to get the n's on one side so

8n-20=3n+10
-3n -3n

5n-20=10
+20 +20

So 5n=30

Devide each side by 5

so n=6

[Z3R0_SK8R_182]

^ why did you bring up a thread that has already been answered?

[Skatergirl7]

use distributive law( get rid of parenthasies).
4 (2n - 5) = 3n + 10
8n - 20 = 3n + 10
now, its varriables on both sides of the equation.just move them over and switch the sign(+ or - on the ones that u move across the = .


8n - 3n = 10 + 20
5n = 30 now divide and u get the answer:n = 6

[muska200]

thanks! I just needed a refresher.

If i could rep you i could.

Can sombody rep him on my behalf?
What da fuck r u talking about???????????????

[BLIND4LIFe]

What da fuck r u talking about???????????????

i think he means add a rep point but he cant for some reson

[Kevo]

We're on the same things. I hate it. Some problems are so easy but some are a bitch. I just got done doing the homework for it. They need a website where you just type it in and it shows you step by step.

[emericaskater443]

dude i just took a test on this it freaking sucks