MHB Changing subject of formula help sites

[fordy2707]

hi all ,does anyone know of good learning resources for rearranging formula ,starting from the basic level all the way to advanced levels ? many thanks

 

[fordy2707]

well I've found this which is good

http://www.maths.com/algebra/change-the-subject-of-a-formula/index.htm

the problem I am having throughout my maths module on any subject is this,i can always do the basic examples so easily ,but come the crunch question time the questions are ridiculously hard and seem to be so complex compared to examples that I lose my focus and can compute them in my head

 

[Deveno]

Well, math is a lot like distillation-it takes lots and lots of raw material to squeeze out a precious drop of understanding.

There is "trick" to algebra (this applies to more advanced kinds, too)-you have to understand what a thing DOES, so you can UNDO it.

For example, if $y = x + b$, then $x = y - b$, because "subtraction" undoes "addition". Now this is an "easy" example, because most people are so "used" to adding, that it is "natural" to think of subtracting after adding to "go back".