Question

2x+5=13

Answer 1

welcome =)

Answer 2

question? x?

Answer 3

Solve for x. (I'm assuming)

Answer 4

get x by itself. subtract the 5 and then divide by two on both sides an get.................

Answer 5

OS is dead, so everyone is gathering to the new question, lol.

Answer 6

once school starts it will be over loaded

Answer 7

Can't wait.

Answer 8

So we can start by seeing that this is a system of equations of 1 variable so we can represent this as a vector in a matrix equation after subracting 5 from both sides (since both sides are equal, anything you do to either side must be equal.)

\[\left[ 2 \right]\left[ x \right]=\left[ 8 \right]\]
now we can see that it's easily solved by row reduction.

\[\left[ 2| 8 \right]\]
now we can divide the whole row by 2 to get it into reduced row echelon form, which is basically where you have the identity matrix on the left.

\[\left[ 1| 4 \right]\]

There you go, x=4.

Answer 9

ouch that might be a bit advanced for @marlic

Answer 10

Haha, wtf @Kainui

Answer 11

although a great way of thunkning about it

Answer 12

This is what i think about every time I see an algebra question posted in the "Linear Algebra" section. Although technically this question was safe... Well they weren't. Mwahahaha.

Answer 13

lol yeah I will be one overloading the q box ><

Answer 14

=D

Answer 15

I have to wait til the spring for my matrix and linear algebra courses :/

Answer 16

...and going back to 8th grade here is how we solve for x: