Thread: Making x the subject (HARD)

Don't get how you do this!

I am sure you don't start working it out by multiplying the bracets but i dunno!

here it is:

5(x-3) = y(4-3x)

Thanks a bubble

Originally Posted by Danielisew

Don't get how you do this!

I am sure you don't start working it out by multiplying the bracets but i dunno!

here it is:

5(x-3) = y(4-3x)

Thanks a bubble

You are solving for x?


<-- Distribute the parentheses

<-- Get all x terms on one side

<-- Factor the LHS



-Dan

Originally Posted by Danielisew

Don't get how you do this!

I am sure you don't start working it out by multiplying the bracets but i dunno!

here it is:

5(x-3) = y(4-3x)

Thanks a bubble

what did you try?

...........expand

.....now get all the terms with 's on one side



Can you take it from here?

EDIT: Oh, well, Dan finished the problem already, forget it

Thanks both of you..
But how can you just get x by itself when you factorised it? Technically, isn't it still multiplying the bracets, so how did you just take it by itself and make it the subject of what was there ..

Thanks

Originally Posted by Danielisew

Thanks both of you..
But how can you just get x by itself when you factorised it? Technically, isn't it still multiplying the bracets, so how did you just take it by itself and make it the subject of what was there ..

Thanks

maybe i'm answering the wrong question, but once you factor out the x, you just divide both sides by what is multiplying the x. this gets the x by itself

This is my 2222 post! It's not a multiple of 100, but i think it looks cool nonetheless

lol nice

Thanks a lot