i thinkof a no & add 12 then i start again with the no double it & subtract 8 .the two results are same. can someone help

Question

anonymous · Answer

add eight over and subtract x
$$4=x$$

parthkohli · Answer

Another way:$$x - 4 = 2(x - 4)$$So obviously, $x - 4 = 0$.

shubhamsrg · Answer

Or,
x= +inf or -inf! ;)

parthkohli · Answer

I hope any one of you didn't think of dividing both sides by $x - 4$, or you could have been jailed . . .

parthkohli · Answer

Oh, new question?$$x + 12 = 2x - 8$$

anonymous · Answer

thanks A lot to help me but please can u tell me how to solve it step by step i ll highly apperciate thanx & regards in advance

anonymous · Answer

So you want to isolate x. First step is to get like terms on the same side with each other. SO add 8 over and subtract so you get 
$$4=x$$
in this case. 

It won't always isolate quite so easily there may be division/multiplication involved but the process involved is always the same. Combine like terms and then isolate x

anonymous · Answer

thanks & regards