must be a proof using variables.
125236
let a = b  \nMultiply both sides by a \na² = ab  \n Add (a² - 2ab) to both sides \na² + a² - 2ab = ab + a² - 2ab  \n Factor the left, and collect like terms on the right \n2(a² - ab) = a² - ab  \n Divide both sides by (a² - ab)\n2 = 1\n(The place where the proof goes wrong is the very last step.  If a² - ab = 0, then you would be dividing by zero, which is undefined.)
187397
When there is proof!!
314403
I think you're missing a variable...in order to find x, you have to know what the end result is.
486045
Though I tried to come up with a proof for you, I'm not sure where J is and that is necessary to continue
463723
You have a couple of typos, I think.  As for the "proof", dividing by x - y is dividing by zero.  That is a no-no.  (In other words, a * 0 = b * 0 does not imply a = b.)
656277
It is really surprising that there are still people who think they have a PROOF for statements like 1=2, 1=0, etc.\nFirst they should UNDERSTAND what is a PROOF.\n\nPROOF is a sequence of logically correct steps. If ONE of your step is wrong then it is NOT called a proof.\n\nI think these people should go back to Primary schools and LEARN the fundamentals.
437041
If there are 2 variables, and you need the answer rather than simplifying, then you will need another equation (simultaneous equations) I would have thought.
372037
You will have to do an epsilon-delta proof.\nNotice that\n|f(x)-f(y)|=\n|x^3-y^3 -x+y|=\n|x-y|*|x^2+xy+y^2 -1|<=\n|x-y|*[|x|^2 +|x|*|y|+|y|^2 +1]\n<=148*|x-y|
538300
They could all potentially be valid C statements, depending on what functions and variables have already been defined.\n\nRawlyn.
503303
People can come up with mathematical formulas that prove I am God if they really wanted to.
42864
You can do this one yourself,\n\nPV = nRT
403554
-x<=3-y<=x\nso u have\n-x<=3-y\n3-y<=x\nor\ny-x<=3\ny+x>=3\n\nx=y cannot be simplified further
27949
C is the logical answer...
233847
I see. You just want to prove something.
498016
The only case that I could think of that A is not equal to B where AC=BC is when C=0.  Other than that A must equal B for the expression to be valid
59742
A variable Equation is an equation in which there are one or more variables. :)
330576
You can conduct an experiment to prove (b).  Therefore, it is testable.