Question

3x-4(x+3)=20

Answer 1

PEMDAS Please Excuse My Dear Aunt Sally... that's how I learned it; the order of operations. Parenthesis, then exponents, multiplication, division, addition, subtraction from left to right

Answer 2

we'll have to distribute the 4 here first in this case, this is a form of multiplication i think. So by distributive multiplication property we get: 3x-4x+12=20

then just solve for x

Answer 3

x=-8
?

Answer 4

yup

Answer 5

3x+(-4x-12) = 20
3x-4x-12 = 20
3x-4x = 12+20

You may finish the maths yourself?

Answer 6

oh! :o.. yes, ma bad, volcomusa is right sorry about that. LOOK at her work

I forgot to distribute the - sign to 3. instead of 12 it should be -12 as volcumusa pointed out

Answer 7

why does this equal -8? you made me think I was tripping at first lol, i checked my work like fourteen times and im in calc lol its late xD

http://www.wolframalpha.com/input/?i=3x-4%28x%2B3%29%3D20

Answer 8

lol yea :p ... endiia, I hope you are still on, and can catch the mistake.

Answer 9

lol- was takin a break an getting a quick snack

Answer 10

but yea- i c now- thanks

Answer 11

thanks for the link to the sight :)