What is the solution to the equation1/3(9x-6)=2x+3 ? x =
\(\large\color{black}{ \displaystyle \frac{1}{3}(9x-6)=2x+3 }\) like this?
yeah
alright, can you expand the left side for me?
what is: 1. \(\large\color{black}{ \displaystyle \frac{1}{3} \times 9x }\) 2. \(\large\color{black}{ \displaystyle \frac{1}{3} \times (-6) }\) ?
I don't know what x is I have been trying but I can't
I just want you to answer the 2 questions I asked you above (for now).
can you simplify #1 and #2 ?
1 is? 2 is -2
2 is -2, that is correct.
1 is3x
yes,
So, \(\large\color{black}{ \displaystyle \frac{1}{3}(9x-6)=2x+3 }\),. after expanding the left side, becomes, \(\large\color{black}{ \displaystyle 3x-2=2x+3 }\)
ok so what is x
See what happens?
then, you would need to subtract 2x from both sides
I have: \(\large\color{black}{ \displaystyle 3x-2=2x+3 }\) subtract 2x from both sides, \(\large\color{black}{ \displaystyle 3x-2\color{red}{-2x}=2x+3\color{red}{-2x} }\)
so is the answer 1
is this making sense, how to subtract 2x from both sides?
no, it is not 1. if you plug in 1 for x, yu will see why it is not 1, because then you get 1=5.
first, can you tell me what you get on each side, after subtracting 2x from both sides as I did.
\(\large\color{black}{ \displaystyle 3x-2\color{red}{-2x}=2x+3 \color{red}{-2x}}\) \(\large\color{black}{ \displaystyle ?=?}\) what do you get?
yeah subtract 2x from 3x and 2x from 2x then you get 1x - 2=3
sorry I'm lagging
yes, which is same as \(\large\color{black}{ \displaystyle x-2=3}\)
because \(\large\color{black}{ \displaystyle1x}\) is same as \(\large\color{black}{ \displaystyle x}\)
(add 2 to both sides) I am also lagging, it is alright
\(\large\color{black}{ \displaystyle x-2=3}\) \(\large\color{black}{ \displaystyle x-2\color{royalblue}{+2}=3\color{royalblue}{+2}}\) then, \(\large\color{black}{ \displaystyle x=?}\)
so 5 right
yes.
x=5:)
yes, ik. So I am saying that x=5 is correct. your solution for x is 5, and that is written as x=5
\(\large\color{black}{ \displaystyle \frac{1}{3}(9x-6)=2x+3}\) checking: \(\large\color{black}{ \displaystyle \frac{1}{3}(9\color{green}{(5)}-6)=2\color{green}{(5)}+3}\) \(\large\color{black}{ \displaystyle \frac{1}{3}(45-6)=10+3}\) \(\large\color{black}{ \displaystyle \frac{1}{3}(39)=10+3}\) \(\large\color{black}{ \displaystyle 13=13}\)
any questions?
thanks:)
yw
Join our real-time social learning platform and learn together with your friends!